65212401672 has 128 divisors (see below), whose sum is σ = 198706435200. Its totient is φ = 19652025600.

The previous prime is 65212401671. The next prime is 65212401707. The reversal of 65212401672 is 27610421256.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (65212401671) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 354238 + ... + 505874.

It is an arithmetic number, because the mean of its divisors is an integer number (1552394025).

Almost surely, 2^65212401672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65212401672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99353217600).

65212401672 is an abundant number, since it is smaller than the sum of its proper divisors (133494033528).

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

65212401672 is a wasteful number, since it uses less digits than its factorization.

65212401672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151844 (or 151834 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 65212401672 in words is "sixty-five billion, two hundred twelve million, four hundred one thousand, six hundred seventy-two".