156161055671 has 2 divisors, whose sum is σ = 156161055672. Its totient is φ = 156161055670.

The previous prime is 156161055647. The next prime is 156161055697. The reversal of 156161055671 is 176550161651.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156161055671 is a prime.

It is a super-2 number, since 2×156161055671² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156161055641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78080527835 + 78080527836.

It is an arithmetic number, because the mean of its divisors is an integer number (78080527836).

Almost surely, 2^156161055671 is an apocalyptic number.

156161055671 is a deficient number, since it is larger than the sum of its proper divisors (1).

156161055671 is an equidigital number, since it uses as much as digits as its factorization.

156161055671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 44.

The spelling of 156161055671 in words is "one hundred fifty-six billion, one hundred sixty-one million, fifty-five thousand, six hundred seventy-one".