64813408825 has 24 divisors (see below), whose sum is σ = 88212809376. Its totient is φ = 46847808000.

The previous prime is 64813408801. The next prime is 64813408841. The reversal of 64813408825 is 52880431846.

64813408825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64813408825 - 2⁷ = 64813408697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 678136 + ... + 767785.

It is an arithmetic number, because the mean of its divisors is an integer number (3675533724).

Almost surely, 2^64813408825 is an apocalyptic number.

It is an amenable number.

64813408825 is a deficient number, since it is larger than the sum of its proper divisors (23399400551).

64813408825 is a wasteful number, since it uses less digits than its factorization.

64813408825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446105 (or 1446100 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 49.

The spelling of 64813408825 in words is "sixty-four billion, eight hundred thirteen million, four hundred eight thousand, eight hundred twenty-five".