155727210971 has 2 divisors, whose sum is σ = 155727210972. Its totient is φ = 155727210970.

The previous prime is 155727210959. The next prime is 155727211093. The reversal of 155727210971 is 179012727551.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155727210971 is a prime.

It is not a weakly prime, because it can be changed into another prime (155727210071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77863605485 + 77863605486.

It is an arithmetic number, because the mean of its divisors is an integer number (77863605486).

Almost surely, 2^155727210971 is an apocalyptic number.

155727210971 is a deficient number, since it is larger than the sum of its proper divisors (1).

155727210971 is an equidigital number, since it uses as much as digits as its factorization.

155727210971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 308700, while the sum is 47.

The spelling of 155727210971 in words is "one hundred fifty-five billion, seven hundred twenty-seven million, two hundred ten thousand, nine hundred seventy-one".