38857113157 has 2 divisors, whose sum is σ = 38857113158. Its totient is φ = 38857113156.

The previous prime is 38857113149. The next prime is 38857113173. The reversal of 38857113157 is 75131175883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38303969796 + 553143361 = 195714^2 + 23519^2 .

It is an emirp because it is prime and its reverse (75131175883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38857113157 - 2³ = 38857113149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38857113157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38857113257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19428556578 + 19428556579.

It is an arithmetic number, because the mean of its divisors is an integer number (19428556579).

Almost surely, 2^38857113157 is an apocalyptic number.

It is an amenable number.

38857113157 is a deficient number, since it is larger than the sum of its proper divisors (1).

38857113157 is an equidigital number, since it uses as much as digits as its factorization.

38857113157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705600, while the sum is 49.

The spelling of 38857113157 in words is "thirty-eight billion, eight hundred fifty-seven million, one hundred thirteen thousand, one hundred fifty-seven".