251879042045 has 8 divisors (see below), whose sum is σ = 302302645560. Its totient is φ = 201471370240.

The previous prime is 251879041987. The next prime is 251879042047. The reversal of 251879042045 is 540240978152.

It can be written as a sum of positive squares in 4 ways, for example, as 91272868996 + 160606173049 = 302114^2 + 400757^2 .

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

It is not a de Polignac number, because 251879042045 - 2⁸ = 251879041789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251879042047) 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, 3948116 + ... + 4011405.

It is an arithmetic number, because the mean of its divisors is an integer number (37787830695).

Almost surely, 2^251879042045 is an apocalyptic number.

It is an amenable number.

251879042045 is a deficient number, since it is larger than the sum of its proper divisors (50423603515).

251879042045 is an equidigital number, since it uses as much as digits as its factorization.

251879042045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7965855.

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 251879042045 in words is "two hundred fifty-one billion, eight hundred seventy-nine million, forty-two thousand, forty-five".