25908440051 has 12 divisors (see below), whose sum is σ = 28060422120. Its totient is φ = 23910606720.

The previous prime is 25908440021. The next prime is 25908440081. The reversal of 25908440051 is 15004480952.

It is an interprime number because it is at equal distance from previous prime (25908440021) and next prime (25908440081).

It is not a de Polignac number, because 25908440051 - 2¹⁸ = 25908177907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25908439987 and 25908440014.

It is not an unprimeable number, because it can be changed into a prime (25908440021) 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 11 ways as a sum of consecutive naturals, for example, 1016795 + ... + 1041963.

It is an arithmetic number, because the mean of its divisors is an integer number (2338368510).

Almost surely, 2^25908440051 is an apocalyptic number.

25908440051 is a deficient number, since it is larger than the sum of its proper divisors (2151982069).

25908440051 is a wasteful number, since it uses less digits than its factorization.

25908440051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31286 (or 31273 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 25908440051 in words is "twenty-five billion, nine hundred eight million, four hundred forty thousand, fifty-one".