253661512260 has 96 divisors (see below), whose sum is σ = 765478006272. Its totient is φ = 62391513600.

The previous prime is 253661512253. The next prime is 253661512297. The reversal of 253661512260 is 62215166352.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 889797 + ... + 1139763.

It is an arithmetic number, because the mean of its divisors is an integer number (7973729232).

Almost surely, 2^253661512260 is an apocalyptic number.

253661512260 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 253661512260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382739003136).

253661512260 is an abundant number, since it is smaller than the sum of its proper divisors (511816494012).

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

253661512260 is a wasteful number, since it uses less digits than its factorization.

253661512260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251293 (or 251291 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 253661512260 in words is "two hundred fifty-three billion, six hundred sixty-one million, five hundred twelve thousand, two hundred sixty".