155012254399957 has 2 divisors, whose sum is σ = 155012254399958. Its totient is φ = 155012254399956.

The previous prime is 155012254399907. The next prime is 155012254400041. The reversal of 155012254399957 is 759993452210551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147196925360676 + 7815329039281 = 12132474^2 + 2795591^2 .

It is a cyclic number.

It is not a de Polignac number, because 155012254399957 - 2¹⁵ = 155012254367189 is a prime.

It is a super-2 number, since 2×155012254399957² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155012254399892 and 155012254399901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155012254399907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77506127199978 + 77506127199979.

It is an arithmetic number, because the mean of its divisors is an integer number (77506127199979).

Almost surely, 2^{155012254399957} is an apocalyptic number.

It is an amenable number.

155012254399957 is a deficient number, since it is larger than the sum of its proper divisors (1).

155012254399957 is an equidigital number, since it uses as much as digits as its factorization.

155012254399957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 153090000, while the sum is 67.

The spelling of 155012254399957 in words is "one hundred fifty-five trillion, twelve billion, two hundred fifty-four million, three hundred ninety-nine thousand, nine hundred fifty-seven".