16238238157 has 4 divisors (see below), whose sum is σ = 16322374300. Its totient is φ = 16154102016.

The previous prime is 16238238139. The next prime is 16238238239. The reversal of 16238238157 is 75183283261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75183283261 = 29 ⋅2592527009.

It can be written as a sum of positive squares in 2 ways, for example, as 11087879401 + 5150358756 = 105299^2 + 71766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16238238157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16238238127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42067782 + ... + 42068167.

It is an arithmetic number, because the mean of its divisors is an integer number (4080593575).

Almost surely, 2^16238238157 is an apocalyptic number.

It is an amenable number.

16238238157 is a deficient number, since it is larger than the sum of its proper divisors (84136143).

16238238157 is an equidigital number, since it uses as much as digits as its factorization.

16238238157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84136142.

The product of its digits is 483840, while the sum is 46.

The spelling of 16238238157 in words is "sixteen billion, two hundred thirty-eight million, two hundred thirty-eight thousand, one hundred fifty-seven".