157505559257 has 2 divisors, whose sum is σ = 157505559258. Its totient is φ = 157505559256.

The previous prime is 157505559251. The next prime is 157505559293. The reversal of 157505559257 is 752955505751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141061087561 + 16444471696 = 375581^2 + 128236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157505559257 is a prime.

It is not a weakly prime, because it can be changed into another prime (157505559251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78752779628 + 78752779629.

It is an arithmetic number, because the mean of its divisors is an integer number (78752779629).

Almost surely, 2^157505559257 is an apocalyptic number.

It is an amenable number.

157505559257 is a deficient number, since it is larger than the sum of its proper divisors (1).

157505559257 is an equidigital number, since it uses as much as digits as its factorization.

157505559257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13781250, while the sum is 56.

The spelling of 157505559257 in words is "one hundred fifty-seven billion, five hundred five million, five hundred fifty-nine thousand, two hundred fifty-seven".