252636804640 has 96 divisors (see below), whose sum is σ = 653839361280. Its totient is φ = 91483392000.

The previous prime is 252636804617. The next prime is 252636804643. The reversal of 252636804640 is 46408636252.

It is not an unprimeable number, because it can be changed into a prime (252636804643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120340 + ... + 720940.

It is an arithmetic number, because the mean of its divisors is an integer number (6810826680).

Almost surely, 2^252636804640 is an apocalyptic number.

252636804640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 252636804640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326919680640).

252636804640 is an abundant number, since it is smaller than the sum of its proper divisors (401202556640).

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

252636804640 is a wasteful number, since it uses less digits than its factorization.

252636804640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600866 (or 600858 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 46.

The spelling of 252636804640 in words is "two hundred fifty-two billion, six hundred thirty-six million, eight hundred four thousand, six hundred forty".