252639430057 has 8 divisors (see below), whose sum is σ = 289309400000. Its totient is φ = 216114115824.

The previous prime is 252639430027. The next prime is 252639430091. The reversal of 252639430057 is 750034936252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252639430057 is a prime.

It is the 502633-rd Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 252639429989 and 252639430016.

It is not an unprimeable number, because it can be changed into a prime (252639430027) by changing a digit.

It is a nontrivial repunit in base 502632.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36160182 + ... + 36167167.

It is an arithmetic number, because the mean of its divisors is an integer number (36163675000).

Almost surely, 2^252639430057 is an apocalyptic number.

It is an amenable number.

252639430057 is a deficient number, since it is larger than the sum of its proper divisors (36669969943).

252639430057 is an equidigital number, since it uses as much as digits as its factorization.

252639430057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72327855.

The product of its (nonzero) digits is 1360800, while the sum is 46.

It can be divided in two parts, 252639 and 430057, that added together give a triangular number (682696 = T₁₁₆₈).

The spelling of 252639430057 in words is "two hundred fifty-two billion, six hundred thirty-nine million, four hundred thirty thousand, fifty-seven".