157866258457 has 2 divisors, whose sum is σ = 157866258458. Its totient is φ = 157866258456.

The previous prime is 157866258409. The next prime is 157866258499. The reversal of 157866258457 is 754852668751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130737203776 + 27129054681 = 361576^2 + 164709^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157866258457 is a prime.

It is not a weakly prime, because it can be changed into another prime (157866252457) 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, 78933129228 + 78933129229.

It is an arithmetic number, because the mean of its divisors is an integer number (78933129229).

Almost surely, 2^157866258457 is an apocalyptic number.

It is an amenable number.

157866258457 is a deficient number, since it is larger than the sum of its proper divisors (1).

157866258457 is an equidigital number, since it uses as much as digits as its factorization.

157866258457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896000, while the sum is 64.

The spelling of 157866258457 in words is "one hundred fifty-seven billion, eight hundred sixty-six million, two hundred fifty-eight thousand, four hundred fifty-seven".