157915879789 has 2 divisors, whose sum is σ = 157915879790. Its totient is φ = 157915879788.

The previous prime is 157915879721. The next prime is 157915879799. The reversal of 157915879789 is 987978519751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104435617225 + 53480262564 = 323165^2 + 231258^2 .

It is a cyclic number.

It is not a de Polignac number, because 157915879789 - 2¹⁵ = 157915847021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157915879799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78957939894 + 78957939895.

It is an arithmetic number, because the mean of its divisors is an integer number (78957939895).

Almost surely, 2^157915879789 is an apocalyptic number.

It is an amenable number.

157915879789 is a deficient number, since it is larger than the sum of its proper divisors (1).

157915879789 is an equidigital number, since it uses as much as digits as its factorization.

157915879789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 400075200, while the sum is 76.

The spelling of 157915879789 in words is "one hundred fifty-seven billion, nine hundred fifteen million, eight hundred seventy-nine thousand, seven hundred eighty-nine".