157892797109 has 2 divisors, whose sum is σ = 157892797110. Its totient is φ = 157892797108.

The previous prime is 157892797067. The next prime is 157892797157. The reversal of 157892797109 is 901797298751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143605376209 + 14287420900 = 378953^2 + 119530^2 .

It is a cyclic number.

It is not a de Polignac number, because 157892797109 - 2³² = 153597829813 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157892797159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78946398554 + 78946398555.

It is an arithmetic number, because the mean of its divisors is an integer number (78946398555).

Almost surely, 2^157892797109 is an apocalyptic number.

It is an amenable number.

157892797109 is a deficient number, since it is larger than the sum of its proper divisors (1).

157892797109 is an equidigital number, since it uses as much as digits as its factorization.

157892797109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20003760, while the sum is 65.

The spelling of 157892797109 in words is "one hundred fifty-seven billion, eight hundred ninety-two million, seven hundred ninety-seven thousand, one hundred nine".