253515722560 has 112 divisors (see below), whose sum is σ = 641817945216. Its totient is φ = 95167035392.

The previous prime is 253515722557. The next prime is 253515722561. The reversal of 253515722560 is 65227515352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253515722561) 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, 65127 + ... + 715033.

It is an arithmetic number, because the mean of its divisors is an integer number (5730517368).

Almost surely, 2^253515722560 is an apocalyptic number.

253515722560 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 253515722560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320908972608).

253515722560 is an abundant number, since it is smaller than the sum of its proper divisors (388302222656).

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

253515722560 is a wasteful number, since it uses less digits than its factorization.

253515722560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650000 (or 649990 counting only the distinct ones).

The product of its (nonzero) digits is 630000, while the sum is 43.

The spelling of 253515722560 in words is "two hundred fifty-three billion, five hundred fifteen million, seven hundred twenty-two thousand, five hundred sixty".