155875617979 has 2 divisors, whose sum is σ = 155875617980. Its totient is φ = 155875617978.

The previous prime is 155875617959. The next prime is 155875617991. The reversal of 155875617979 is 979716578551.

155875617979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155875617979 is a prime.

It is not a weakly prime, because it can be changed into another prime (155875617959) 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, 77937808989 + 77937808990.

It is an arithmetic number, because the mean of its divisors is an integer number (77937808990).

Almost surely, 2^155875617979 is an apocalyptic number.

155875617979 is a deficient number, since it is larger than the sum of its proper divisors (1).

155875617979 is an equidigital number, since it uses as much as digits as its factorization.

155875617979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 166698000, while the sum is 70.

The spelling of 155875617979 in words is "one hundred fifty-five billion, eight hundred seventy-five million, six hundred seventeen thousand, nine hundred seventy-nine".