155057205507 has 32 divisors (see below), whose sum is σ = 218160030720. Its totient is φ = 97690056480.

The previous prime is 155057205389. The next prime is 155057205517. The reversal of 155057205507 is 705502750551.

It is not a de Polignac number, because 155057205507 - 2¹⁰ = 155057204483 is a prime.

It is a super-2 number, since 2×155057205507² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155057205517) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70383468 + ... + 70385670.

It is an arithmetic number, because the mean of its divisors is an integer number (6817500960).

Almost surely, 2^155057205507 is an apocalyptic number.

155057205507 is a deficient number, since it is larger than the sum of its proper divisors (63102825213).

155057205507 is a wasteful number, since it uses less digits than its factorization.

155057205507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4703.

The product of its (nonzero) digits is 306250, while the sum is 42.

The spelling of 155057205507 in words is "one hundred fifty-five billion, fifty-seven million, two hundred five thousand, five hundred seven".