64662525646 has 16 divisors (see below), whose sum is σ = 99813669120. Its totient is φ = 31401805240.

The previous prime is 64662525617. The next prime is 64662525661. The reversal of 64662525646 is 64652526646.

It is a junction number, because it is equal to n+sod(n) for n = 64662525593 and 64662525602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2613256 + ... + 2637883.

It is an arithmetic number, because the mean of its divisors is an integer number (6238354320).

Almost surely, 2^64662525646 is an apocalyptic number.

64662525646 is a deficient number, since it is larger than the sum of its proper divisors (35151143474).

64662525646 is a wasteful number, since it uses less digits than its factorization.

64662525646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5251319.

The product of its digits is 12441600, while the sum is 52.

The spelling of 64662525646 in words is "sixty-four billion, six hundred sixty-two million, five hundred twenty-five thousand, six hundred forty-six".