155616795497 has 2 divisors, whose sum is σ = 155616795498. Its totient is φ = 155616795496.

The previous prime is 155616795491. The next prime is 155616795577. The reversal of 155616795497 is 794597616551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92447010601 + 63169784896 = 304051^2 + 251336^2 .

It is a cyclic number.

It is not a de Polignac number, because 155616795497 - 2⁸ = 155616795241 is a prime.

It is not a weakly prime, because it can be changed into another prime (155616795491) 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, 77808397748 + 77808397749.

It is an arithmetic number, because the mean of its divisors is an integer number (77808397749).

Almost surely, 2^155616795497 is an apocalyptic number.

It is an amenable number.

155616795497 is a deficient number, since it is larger than the sum of its proper divisors (1).

155616795497 is an equidigital number, since it uses as much as digits as its factorization.

155616795497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71442000, while the sum is 65.

The spelling of 155616795497 in words is "one hundred fifty-five billion, six hundred sixteen million, seven hundred ninety-five thousand, four hundred ninety-seven".