253523661456 has 40 divisors (see below), whose sum is σ = 705315829120. Its totient is φ = 78007280256.

The previous prime is 253523661421. The next prime is 253523661463. The reversal of 253523661456 is 654166325352.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203143336 + ... + 203144583.

It is an arithmetic number, because the mean of its divisors is an integer number (17632895728).

Almost surely, 2^253523661456 is an apocalyptic number.

253523661456 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

253523661456 is an abundant number, since it is smaller than the sum of its proper divisors (451792167664).

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

253523661456 is a wasteful number, since it uses less digits than its factorization.

253523661456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406287943 (or 406287937 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 48.

The spelling of 253523661456 in words is "two hundred fifty-three billion, five hundred twenty-three million, six hundred sixty-one thousand, four hundred fifty-six".