38725646418 has 12 divisors (see below), whose sum is σ = 83905567278. Its totient is φ = 12908548800.

The previous prime is 38725646353. The next prime is 38725646429. The reversal of 38725646418 is 81464652783.

It is a happy number.

38725646418 is a `hidden beast` number, since 3 + 8 + 7 + 2 + 564 + 64 + 18 = 666.

It can be written as a sum of positive squares in only one way, i.e., 35292506769 + 3433139649 = 187863^2 + 58593^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1075712383 + ... + 1075712418.

Almost surely, 2^38725646418 is an apocalyptic number.

38725646418 is an abundant number, since it is smaller than the sum of its proper divisors (45179920860).

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

38725646418 is a wasteful number, since it uses less digits than its factorization.

38725646418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151424809 (or 2151424806 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 54.

The spelling of 38725646418 in words is "thirty-eight billion, seven hundred twenty-five million, six hundred forty-six thousand, four hundred eighteen".