252642371285 has 4 divisors (see below), whose sum is σ = 303170845548. Its totient is φ = 202113897024.

The previous prime is 252642371239. The next prime is 252642371297. The reversal of 252642371285 is 582173246252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58343020849 + 194299350436 = 241543^2 + 440794^2 .

It is a cyclic number.

It is not a de Polignac number, because 252642371285 - 2¹⁶ = 252642305749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25264237124 + ... + 25264237133.

It is an arithmetic number, because the mean of its divisors is an integer number (75792711387).

Almost surely, 2^252642371285 is an apocalyptic number.

It is an amenable number.

252642371285 is a deficient number, since it is larger than the sum of its proper divisors (50528474263).

252642371285 is an equidigital number, since it uses as much as digits as its factorization.

252642371285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50528474262.

The product of its digits is 1612800, while the sum is 47.

The spelling of 252642371285 in words is "two hundred fifty-two billion, six hundred forty-two million, three hundred seventy-one thousand, two hundred eighty-five".