64351692692 has 48 divisors (see below), whose sum is σ = 129101616000. Its totient is φ = 27494093952.

The previous prime is 64351692673. The next prime is 64351692737. The reversal of 64351692692 is 29629615346.

It is a happy number.

It is a super-2 number, since 2×64351692692² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16946138 + ... + 16949934.

It is an arithmetic number, because the mean of its divisors is an integer number (2689617000).

Almost surely, 2^64351692692 is an apocalyptic number.

It is an amenable number.

64351692692 is an abundant number, since it is smaller than the sum of its proper divisors (64749923308).

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

64351692692 is a wasteful number, since it uses less digits than its factorization.

64351692692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5520 (or 5518 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 53.

The spelling of 64351692692 in words is "sixty-four billion, three hundred fifty-one million, six hundred ninety-two thousand, six hundred ninety-two".