253684981856 has 24 divisors (see below), whose sum is σ = 499536470664. Its totient is φ = 126818576640.

The previous prime is 253684981853. The next prime is 253684981877. The reversal of 253684981856 is 658189486352.

It is a junction number, because it is equal to n+sod(n) for n = 253684981792 and 253684981801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253684981853) 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, 574325 + ... + 914996.

It is an arithmetic number, because the mean of its divisors is an integer number (20814019611).

Almost surely, 2^253684981856 is an apocalyptic number.

It is an amenable number.

253684981856 is a deficient number, since it is larger than the sum of its proper divisors (245851488808).

253684981856 is a wasteful number, since it uses less digits than its factorization.

253684981856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494654 (or 1494646 counting only the distinct ones).

The product of its digits is 99532800, while the sum is 65.

The spelling of 253684981856 in words is "two hundred fifty-three billion, six hundred eighty-four million, nine hundred eighty-one thousand, eight hundred fifty-six".