252765262640 has 40 divisors (see below), whose sum is σ = 641104622928. Its totient is φ = 91914640640.

The previous prime is 252765262639. The next prime is 252765262657. The reversal of 252765262640 is 46262567252.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143615747 + ... + 143617506.

Almost surely, 2^252765262640 is an apocalyptic number.

252765262640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252765262640 is an abundant number, since it is smaller than the sum of its proper divisors (388339360288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

252765262640 is a wasteful number, since it uses less digits than its factorization.

252765262640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287233277 (or 287233271 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 47.

The spelling of 252765262640 in words is "two hundred fifty-two billion, seven hundred sixty-five million, two hundred sixty-two thousand, six hundred forty".