252449973136 has 45 divisors (see below), whose sum is σ = 497786347441. Its totient is φ = 124027296512.

The previous prime is 252449973133. The next prime is 252449973169. The reversal of 252449973136 is 631379944252.

It is a happy number.

The square root of 252449973136 is 502444.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 63885595536 + 188564377600 = 252756^2 + 434240^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252449973131) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 118575720 + ... + 118577848.

Almost surely, 2^252449973136 is an apocalyptic number.

252449973136 is the 502444-th square number.

It is an amenable number.

252449973136 is a deficient number, since it is larger than the sum of its proper divisors (245336374305).

252449973136 is an frugal number, since it uses more digits than its factorization.

252449973136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4384 (or 2190 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 55.

The spelling of 252449973136 in words is "two hundred fifty-two billion, four hundred forty-nine million, nine hundred seventy-three thousand, one hundred thirty-six".