65213831256 has 64 divisors (see below), whose sum is σ = 192335738880. Its totient is φ = 18031472640.

The previous prime is 65213831251. The next prime is 65213831273.

65213831256 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65213831251) 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, 6255721 + ... + 6266136.

It is an arithmetic number, because the mean of its divisors is an integer number (3005245920).

Almost surely, 2^65213831256 is an apocalyptic number.

It is an amenable number.

65213831256 is an abundant number, since it is smaller than the sum of its proper divisors (127121907624).

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

65213831256 is a wasteful number, since it uses less digits than its factorization.

65213831256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12521904 (or 12521900 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The spelling of 65213831256 in words is "sixty-five billion, two hundred thirteen million, eight hundred thirty-one thousand, two hundred fifty-six".