252951661250 has 80 divisors (see below), whose sum is σ = 482318902296. Its totient is φ = 99443520000.

The previous prime is 252951661231. The next prime is 252951661271. The reversal of 252951661250 is 52166159252.

It is a Cunningham number, because it is equal to 502943²+1.

It can be written as a sum of positive squares in 20 ways, for example, as 13624258729 + 239327402521 = 116723^2 + 489211^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 26731520 + ... + 26740980.

Almost surely, 2^252951661250 is an apocalyptic number.

252951661250 is a deficient number, since it is larger than the sum of its proper divisors (229367241046).

252951661250 is an equidigital number, since it uses as much as digits as its factorization.

252951661250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9849 (or 9834 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 252951661250 in words is "two hundred fifty-two billion, nine hundred fifty-one million, six hundred sixty-one thousand, two hundred fifty".