253645238444 has 24 divisors (see below), whose sum is σ = 478194655008. Its totient is φ = 117025171200.

The previous prime is 253645238423. The next prime is 253645238449. The reversal of 253645238444 is 444832546352.

It is a super-2 number, since 2×253645238444² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 253645238392 and 253645238401.

It is not an unprimeable number, because it can be changed into a prime (253645238449) 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, 725072 + ... + 1016375.

It is an arithmetic number, because the mean of its divisors is an integer number (19924777292).

Almost surely, 2^253645238444 is an apocalyptic number.

It is an amenable number.

253645238444 is a deficient number, since it is larger than the sum of its proper divisors (224549416564).

253645238444 is a wasteful number, since it uses less digits than its factorization.

253645238444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744265 (or 1744263 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 50.

The spelling of 253645238444 in words is "two hundred fifty-three billion, six hundred forty-five million, two hundred thirty-eight thousand, four hundred forty-four".