155085923249 has 2 divisors, whose sum is σ = 155085923250. Its totient is φ = 155085923248.

The previous prime is 155085923231. The next prime is 155085923261. The reversal of 155085923249 is 942329580551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81735951025 + 73349972224 = 285895^2 + 270832^2 .

It is a cyclic number.

It is not a de Polignac number, because 155085923249 - 2²⁰ = 155084874673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155085923249.

It is not a weakly prime, because it can be changed into another prime (155085923269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77542961624 + 77542961625.

It is an arithmetic number, because the mean of its divisors is an integer number (77542961625).

Almost surely, 2^155085923249 is an apocalyptic number.

It is an amenable number.

155085923249 is a deficient number, since it is larger than the sum of its proper divisors (1).

155085923249 is an equidigital number, since it uses as much as digits as its factorization.

155085923249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888000, while the sum is 53.

The spelling of 155085923249 in words is "one hundred fifty-five billion, eighty-five million, nine hundred twenty-three thousand, two hundred forty-nine".