155616795577 has 2 divisors, whose sum is σ = 155616795578. Its totient is φ = 155616795576.

The previous prime is 155616795497. The next prime is 155616795583. The reversal of 155616795577 is 775597616551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155327421456 + 289374121 = 394116^2 + 17011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155616795577 is a prime.

It is not a weakly prime, because it can be changed into another prime (155616795077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77808397788 + 77808397789.

It is an arithmetic number, because the mean of its divisors is an integer number (77808397789).

Almost surely, 2^155616795577 is an apocalyptic number.

It is an amenable number.

155616795577 is a deficient number, since it is larger than the sum of its proper divisors (1).

155616795577 is an equidigital number, since it uses as much as digits as its factorization.

155616795577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69457500, while the sum is 64.

The spelling of 155616795577 in words is "one hundred fifty-five billion, six hundred sixteen million, seven hundred ninety-five thousand, five hundred seventy-seven".