25902549651 has 16 divisors (see below), whose sum is σ = 37797596928. Its totient is φ = 15648031200.

The previous prime is 25902549637. The next prime is 25902549661. The reversal of 25902549651 is 15694520952.

It is not a de Polignac number, because 25902549651 - 2¹¹ = 25902547603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25902549651.

It is not an unprimeable number, because it can be changed into a prime (25902549601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1251676 + ... + 1272201.

It is an arithmetic number, because the mean of its divisors is an integer number (2362349808).

Almost surely, 2^25902549651 is an apocalyptic number.

25902549651 is a deficient number, since it is larger than the sum of its proper divisors (11895047277).

25902549651 is a wasteful number, since it uses less digits than its factorization.

25902549651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524202.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 25902549651 in words is "twenty-five billion, nine hundred two million, five hundred forty-nine thousand, six hundred fifty-one".