38157197571 has 24 divisors (see below), whose sum is σ = 57234637824. Its totient is φ = 24470106480.

The previous prime is 38157197539. The next prime is 38157197581. The reversal of 38157197571 is 17579175183.

38157197571 is a `hidden beast` number, since 3 + 8 + 1 + 57 + 19 + 7 + 571 = 666.

It is not a de Polignac number, because 38157197571 - 2⁵ = 38157197539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38157197531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 362881 + ... + 456066.

It is an arithmetic number, because the mean of its divisors is an integer number (2384776576).

Almost surely, 2^38157197571 is an apocalyptic number.

38157197571 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

38157197571 is a deficient number, since it is larger than the sum of its proper divisors (19077440253).

38157197571 is a wasteful number, since it uses less digits than its factorization.

38157197571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819151 (or 819148 counting only the distinct ones).

The product of its digits is 1852200, while the sum is 54.

The spelling of 38157197571 in words is "thirty-eight billion, one hundred fifty-seven million, one hundred ninety-seven thousand, five hundred seventy-one".