238157844771 has 144 divisors (see below), whose sum is σ = 428684323200. Its totient is φ = 116852440320.

The previous prime is 238157844731. The next prime is 238157844817. The reversal of 238157844771 is 177448751832.

It is not a de Polignac number, because 238157844771 - 2¹⁴ = 238157828387 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (238157844731) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 138221916 + ... + 138223638.

Almost surely, 2^238157844771 is an apocalyptic number.

238157844771 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

238157844771 is a deficient number, since it is larger than the sum of its proper divisors (190526478429).

238157844771 is a wasteful number, since it uses less digits than its factorization.

238157844771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190 (or 2172 counting only the distinct ones).

The product of its digits is 10536960, while the sum is 57.

The spelling of 238157844771 in words is "two hundred thirty-eight billion, one hundred fifty-seven million, eight hundred forty-four thousand, seven hundred seventy-one".