156877813979 has 2 divisors, whose sum is σ = 156877813980. Its totient is φ = 156877813978.

The previous prime is 156877813973. The next prime is 156877814011. The reversal of 156877813979 is 979318778651.

156877813979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156877813979 is a prime.

It is a super-2 number, since 2×156877813979² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (156877813973) 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, 78438906989 + 78438906990.

It is an arithmetic number, because the mean of its divisors is an integer number (78438906990).

Almost surely, 2^156877813979 is an apocalyptic number.

156877813979 is a deficient number, since it is larger than the sum of its proper divisors (1).

156877813979 is an equidigital number, since it uses as much as digits as its factorization.

156877813979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 160030080, while the sum is 71.

The spelling of 156877813979 in words is "one hundred fifty-six billion, eight hundred seventy-seven million, eight hundred thirteen thousand, nine hundred seventy-nine".