65786796544 has 160 divisors (see below), whose sum is σ = 159395512320. Its totient is φ = 26496626688.

The previous prime is 65786796497. The next prime is 65786796547. The reversal of 65786796544 is 44569768756.

It is a super-3 number, since 3×65786796544³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65786796544.

It is not an unprimeable number, because it can be changed into a prime (65786796547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8644389 + ... + 8651995.

It is an arithmetic number, because the mean of its divisors is an integer number (996221952).

Almost surely, 2^65786796544 is an apocalyptic number.

65786796544 is a gapful number since it is divisible by the number (64) 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 65786796544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79697756160).

65786796544 is an abundant number, since it is smaller than the sum of its proper divisors (93608715776).

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

65786796544 is a wasteful number, since it uses less digits than its factorization.

65786796544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7778 (or 7762 counting only the distinct ones).

The product of its digits is 304819200, while the sum is 67.

The spelling of 65786796544 in words is "sixty-five billion, seven hundred eighty-six million, seven hundred ninety-six thousand, five hundred forty-four".