156156816335557 has 2 divisors, whose sum is σ = 156156816335558. Its totient is φ = 156156816335556.

The previous prime is 156156816335549. The next prime is 156156816335561. The reversal of 156156816335557 is 755533618651651.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138623284797921 + 17533531537636 = 11773839^2 + 4187306^2 .

It is a cyclic number.

It is not a de Polignac number, because 156156816335557 - 2³ = 156156816335549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 156156816335492 and 156156816335501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156156816335257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78078408167778 + 78078408167779.

It is an arithmetic number, because the mean of its divisors is an integer number (78078408167779).

Almost surely, 2^{156156816335557} is an apocalyptic number.

It is an amenable number.

156156816335557 is a deficient number, since it is larger than the sum of its proper divisors (1).

156156816335557 is an equidigital number, since it uses as much as digits as its factorization.

156156816335557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200000, while the sum is 67.

The spelling of 156156816335557 in words is "one hundred fifty-six trillion, one hundred fifty-six billion, eight hundred sixteen million, three hundred thirty-five thousand, five hundred fifty-seven".