253775166525 has 18 divisors (see below), whose sum is σ = 454539520890. Its totient is φ = 135346755360.

The previous prime is 253775166523. The next prime is 253775166527. The reversal of 253775166525 is 525661577352.

253775166525 is a `hidden beast` number, since 2 + 5 + 3 + 7 + 7 + 51 + 66 + 525 = 666.

It is an interprime number because it is at equal distance from previous prime (253775166523) and next prime (253775166527).

It can be written as a sum of positive squares in 3 ways, for example, as 11967922404 + 241807244121 = 109398^2 + 491739^2 .

It is not a de Polignac number, because 253775166525 - 2¹ = 253775166523 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253775166523) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 563944590 + ... + 563945039.

It is an arithmetic number, because the mean of its divisors is an integer number (25252195605).

Almost surely, 2^253775166525 is an apocalyptic number.

253775166525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

253775166525 is a deficient number, since it is larger than the sum of its proper divisors (200764354365).

253775166525 is a wasteful number, since it uses less digits than its factorization.

253775166525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127889645 (or 1127889637 counting only the distinct ones).

The product of its digits is 13230000, while the sum is 54.

The spelling of 253775166525 in words is "two hundred fifty-three billion, seven hundred seventy-five million, one hundred sixty-six thousand, five hundred twenty-five".