25161510634 has 16 divisors (see below), whose sum is σ = 40880469672. Its totient is φ = 11545875648.

The previous prime is 25161510617. The next prime is 25161510653. The reversal of 25161510634 is 43601516152.

It can be written as a sum of positive squares in 4 ways, for example, as 16107417225 + 9054093409 = 126915^2 + 95153^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25161510634.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2792469 + ... + 2801464.

Almost surely, 2^25161510634 is an apocalyptic number.

25161510634 is a deficient number, since it is larger than the sum of its proper divisors (15718959038).

25161510634 is a wasteful number, since it uses less digits than its factorization.

25161510634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5594121.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 25161510634 in words is "twenty-five billion, one hundred sixty-one million, five hundred ten thousand, six hundred thirty-four".