25951539490 has 16 divisors (see below), whose sum is σ = 46715615352. Its totient is φ = 10379983744.

The previous prime is 25951539413. The next prime is 25951539503. The reversal of 25951539490 is 9493515952.

25951539490 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 23606171449 + 2345368041 = 153643^2 + 48429^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116472 + ... + 255868.

Almost surely, 2^25951539490 is an apocalyptic number.

25951539490 is a deficient number, since it is larger than the sum of its proper divisors (20764075862).

25951539490 is a wasteful number, since it uses less digits than its factorization.

25951539490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158021.

The product of its (nonzero) digits is 2187000, while the sum is 52.

The spelling of 25951539490 in words is "twenty-five billion, nine hundred fifty-one million, five hundred thirty-nine thousand, four hundred ninety".