38557642321 has 9 divisors (see below), whose sum is σ = 42383915049. Its totient is φ = 35050438500.

The previous prime is 38557642307. The next prime is 38557642337. The reversal of 38557642321 is 12324675583.

The square root of 38557642321 is 196361.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 38557642321 - 2⁵ = 38557642289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38557643321) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2151046 + ... + 2168896.

Almost surely, 2^38557642321 is an apocalyptic number.

38557642321 is the 196361-st square number.

38557642321 is the 98181-st centered octagonal number.

It is an amenable number.

38557642321 is a deficient number, since it is larger than the sum of its proper divisors (3826272728).

38557642321 is an frugal number, since it uses more digits than its factorization.

38557642321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35724 (or 17862 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 46.

The spelling of 38557642321 in words is "thirty-eight billion, five hundred fifty-seven million, six hundred forty-two thousand, three hundred twenty-one".