167800804902025 has 27 divisors (see below), whose sum is σ = 210121090867989. Its totient is φ = 132932051550720.

The previous prime is 167800804902013. The next prime is 167800804902047. The reversal of 167800804902025 is 520209408008761.

The square root of 167800804902025 is 12953795.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1408658023161 + 166392146878864 = 1186869^2 + 12899308^2 .

It is not a de Polignac number, because 167800804902025 - 2¹⁷ = 167800804770953 is a prime.

It is a super-2 number, since 2×167800804902025² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6671191849 + ... + 6671217001.

Almost surely, 2^{167800804902025} is an apocalyptic number.

167800804902025 is the 12953795-th square number.

167800804902025 is the 6476898-th centered octagonal number.

It is an amenable number.

167800804902025 is a deficient number, since it is larger than the sum of its proper divisors (42320285965964).

167800804902025 is an frugal number, since it uses more digits than its factorization.

167800804902025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50522 (or 25261 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 167800804902025 in words is "one hundred sixty-seven trillion, eight hundred billion, eight hundred four million, nine hundred two thousand, twenty-five".