155257477145 has 4 divisors (see below), whose sum is σ = 186308972580. Its totient is φ = 124205981712.

The previous prime is 155257477127. The next prime is 155257477157. The reversal of 155257477145 is 541774752551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43478922256 + 111778554889 = 208516^2 + 334333^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155257477145 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15525747710 + ... + 15525747719.

It is an arithmetic number, because the mean of its divisors is an integer number (46577243145).

Almost surely, 2^155257477145 is an apocalyptic number.

It is an amenable number.

155257477145 is a deficient number, since it is larger than the sum of its proper divisors (31051495435).

155257477145 is an equidigital number, since it uses as much as digits as its factorization.

155257477145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31051495434.

The product of its digits is 6860000, while the sum is 53.

The spelling of 155257477145 in words is "one hundred fifty-five billion, two hundred fifty-seven million, four hundred seventy-seven thousand, one hundred forty-five".