253645660 has 12 divisors (see below), whose sum is σ = 532655928. Its totient is φ = 101458256.

The previous prime is 253645621. The next prime is 253645663. The reversal of 253645660 is 66546352.

It is a super-2 number, since 2×253645660² = 128672241673671200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253645663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6341122 + ... + 6341161.

It is an arithmetic number, because the mean of its divisors is an integer number (44387994).

Almost surely, 2^253645660 is an apocalyptic number.

253645660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253645660 is an abundant number, since it is smaller than the sum of its proper divisors (279010268).

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

253645660 is a wasteful number, since it uses less digits than its factorization.

253645660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12682292 (or 12682290 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

The square root of 253645660 is about 15926.2569362672. The cubic root of 253645660 is about 633.0079220882.

The spelling of 253645660 in words is "two hundred fifty-three million, six hundred forty-five thousand, six hundred sixty".