65448193860 has 576 divisors, whose sum is σ = 246632601600. Its totient is φ = 14106597120.

The previous prime is 65448193847. The next prime is 65448193879. The reversal of 65448193860 is 6839184456.

65448193860 is a `hidden beast` number, since 6 + 5 + 448 + 193 + 8 + 6 + 0 = 666.

It is a super-2 number, since 2×65448193860² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 65448193797 and 65448193806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 156200731 + ... + 156201149.

It is an arithmetic number, because the mean of its divisors is an integer number (428181600).

Almost surely, 2^65448193860 is an apocalyptic number.

65448193860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65448193860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123316300800).

65448193860 is an abundant number, since it is smaller than the sum of its proper divisors (181184407740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65448193860 is a wasteful number, since it uses less digits than its factorization.

65448193860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 510 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 65448193860 in words is "sixty-five billion, four hundred forty-eight million, one hundred ninety-three thousand, eight hundred sixty".