157190019209 has 2 divisors, whose sum is σ = 157190019210. Its totient is φ = 157190019208.

The previous prime is 157190019179. The next prime is 157190019229. The reversal of 157190019209 is 902910091751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146744157184 + 10445862025 = 383072^2 + 102205^2 .

It is a cyclic number.

It is not a de Polignac number, because 157190019209 - 2¹² = 157190015113 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 157190019209.

It is not a weakly prime, because it can be changed into another prime (157190019229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78595009604 + 78595009605.

It is an arithmetic number, because the mean of its divisors is an integer number (78595009605).

Almost surely, 2^157190019209 is an apocalyptic number.

It is an amenable number.

157190019209 is a deficient number, since it is larger than the sum of its proper divisors (1).

157190019209 is an equidigital number, since it uses as much as digits as its factorization.

157190019209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 44.

The spelling of 157190019209 in words is "one hundred fifty-seven billion, one hundred ninety million, nineteen thousand, two hundred nine".