265161172025 has 12 divisors (see below), whose sum is σ = 328824331500. Its totient is φ = 212113145280.

The previous prime is 265161171991. The next prime is 265161172037. The reversal of 265161172025 is 520271161562.

It can be written as a sum of positive squares in 6 ways, for example, as 11521016896 + 253640155129 = 107336^2 + 503627^2 .

It is a de Polignac number, because none of the positive numbers 2^k-265161172025 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 265161172025.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46250 + ... + 729699.

It is an arithmetic number, because the mean of its divisors is an integer number (27402027625).

Almost surely, 2^265161172025 is an apocalyptic number.

265161172025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

265161172025 is a deficient number, since it is larger than the sum of its proper divisors (63663159475).

265161172025 is a wasteful number, since it uses less digits than its factorization.

265161172025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789628 (or 789623 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 265161172025 in words is "two hundred sixty-five billion, one hundred sixty-one million, one hundred seventy-two thousand, twenty-five".