155979745027 has 2 divisors, whose sum is σ = 155979745028. Its totient is φ = 155979745026.

The previous prime is 155979744961. The next prime is 155979745039. The reversal of 155979745027 is 720547979551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155979745027 - 2¹⁹ = 155979220739 is a prime.

It is not a weakly prime, because it can be changed into another prime (155979742027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77989872513 + 77989872514.

It is an arithmetic number, because the mean of its divisors is an integer number (77989872514).

Almost surely, 2^155979745027 is an apocalyptic number.

155979745027 is a deficient number, since it is larger than the sum of its proper divisors (1).

155979745027 is an equidigital number, since it uses as much as digits as its factorization.

155979745027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27783000, while the sum is 61.

The spelling of 155979745027 in words is "one hundred fifty-five billion, nine hundred seventy-nine million, seven hundred forty-five thousand, twenty-seven".