38390552557 has 24 divisors (see below), whose sum is σ = 45945434304. Its totient is φ = 31420608384.

The previous prime is 38390552531. The next prime is 38390552561. The reversal of 38390552557 is 75525509383.

38390552557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-38390552557 is a prime.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38390552527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2187138 + ... + 2204620.

It is an arithmetic number, because the mean of its divisors is an integer number (1914393096).

Almost surely, 2^38390552557 is an apocalyptic number.

It is an amenable number.

38390552557 is a deficient number, since it is larger than the sum of its proper divisors (7554881747).

38390552557 is a wasteful number, since it uses less digits than its factorization.

38390552557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18129 (or 18106 counting only the distinct ones).

The product of its (nonzero) digits is 5670000, while the sum is 52.

The spelling of 38390552557 in words is "thirty-eight billion, three hundred ninety million, five hundred fifty-two thousand, five hundred fifty-seven".