253551391632 has 120 divisors (see below), whose sum is σ = 884685846720. Its totient is φ = 65857501440.

The previous prime is 253551391607. The next prime is 253551391633. The reversal of 253551391632 is 236193155352.

253551391632 is a `hidden beast` number, since 2 + 5 + 3 + 5 + 5 + 1 + 3 + 9 + 1 + 632 = 666.

It is not an unprimeable number, because it can be changed into a prime (253551391633) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11422507 + ... + 11444682.

It is an arithmetic number, because the mean of its divisors is an integer number (7372382056).

Almost surely, 2^253551391632 is an apocalyptic number.

253551391632 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

253551391632 is an abundant number, since it is smaller than the sum of its proper divisors (631134455088).

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

253551391632 is a wasteful number, since it uses less digits than its factorization.

253551391632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22867221 (or 22867212 counting only the distinct ones).

The product of its digits is 729000, while the sum is 45.

The spelling of 253551391632 in words is "two hundred fifty-three billion, five hundred fifty-one million, three hundred ninety-one thousand, six hundred thirty-two".