920170155025 has 81 divisors (see below), whose sum is σ = 1273814377563. Its totient is φ = 658893074400.

The previous prime is 920170155007. The next prime is 920170155029. The reversal of 920170155025 is 520551071029.

The square root of 920170155025 is 959255.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 331261255809 + 588908899216 = 575553^2 + 767404^2 .

It is not a de Polignac number, because 920170155025 - 2⁵ = 920170154993 is a prime.

It is a super-2 number, since 2×920170155025² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920170155029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 5645215594 + ... + 5645215756.

Almost surely, 2^920170155025 is an apocalyptic number.

920170155025 is the 959255-th square number.

920170155025 is the 479628-th centered octagonal number.

It is an amenable number.

920170155025 is a deficient number, since it is larger than the sum of its proper divisors (353644222538).

920170155025 is a wasteful number, since it uses less digits than its factorization.

920170155025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 37.

The spelling of 920170155025 in words is "nine hundred twenty billion, one hundred seventy million, one hundred fifty-five thousand, twenty-five".