253605871840 has 48 divisors (see below), whose sum is σ = 599950538208. Its totient is φ = 101305770496.

The previous prime is 253605871789. The next prime is 253605871843. The reversal of 253605871840 is 48178506352.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253605871843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 947767 + ... + 1185526.

It is an arithmetic number, because the mean of its divisors is an integer number (12498969546).

Almost surely, 2^253605871840 is an apocalyptic number.

253605871840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253605871840 is an abundant number, since it is smaller than the sum of its proper divisors (346344666368).

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

253605871840 is a wasteful number, since it uses less digits than its factorization.

253605871840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134051 (or 2134043 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 253605871840 in words is "two hundred fifty-three billion, six hundred five million, eight hundred seventy-one thousand, eight hundred forty".