155492725096721 has 2 divisors, whose sum is σ = 155492725096722. Its totient is φ = 155492725096720.

The previous prime is 155492725096693. The next prime is 155492725096801. The reversal of 155492725096721 is 127690527294551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153891741006721 + 1600984090000 = 12405311^2 + 1265300^2 .

It is a cyclic number.

It is not a de Polignac number, because 155492725096721 - 2³⁴ = 155475545227537 is a prime.

It is not a weakly prime, because it can be changed into another prime (155492725096021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77746362548360 + 77746362548361.

It is an arithmetic number, because the mean of its divisors is an integer number (77746362548361).

Almost surely, 2^{155492725096721} is an apocalyptic number.

It is an amenable number.

155492725096721 is a deficient number, since it is larger than the sum of its proper divisors (1).

155492725096721 is an equidigital number, since it uses as much as digits as its factorization.

155492725096721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256000, while the sum is 65.

The spelling of 155492725096721 in words is "one hundred fifty-five trillion, four hundred ninety-two billion, seven hundred twenty-five million, ninety-six thousand, seven hundred twenty-one".