252663178509 has 24 divisors (see below), whose sum is σ = 427267818432. Its totient is φ = 140857519680.

The previous prime is 252663178483. The next prime is 252663178511. The reversal of 252663178509 is 905871366252.

252663178509 is a `hidden beast` number, since 2 + 5 + 2 + 6 + 63 + 1 + 78 + 509 = 666.

It is not a de Polignac number, because 252663178509 - 2⁷ = 252663178381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252663178909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48906279 + ... + 48911444.

It is an arithmetic number, because the mean of its divisors is an integer number (17802825768).

Almost surely, 2^252663178509 is an apocalyptic number.

It is an amenable number.

252663178509 is a deficient number, since it is larger than the sum of its proper divisors (174604639923).

252663178509 is a wasteful number, since it uses less digits than its factorization.

252663178509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97817777 (or 97817774 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 54.

The spelling of 252663178509 in words is "two hundred fifty-two billion, six hundred sixty-three million, one hundred seventy-eight thousand, five hundred nine".