25953805251 has 24 divisors (see below), whose sum is σ = 40952813616. Its totient is φ = 15708075840.

The previous prime is 25953805249. The next prime is 25953805261. The reversal of 25953805251 is 15250835952.

It is a happy number.

25953805251 is a `hidden beast` number, since 2 + 5 + 95 + 38 + 0 + 525 + 1 = 666.

It is not a de Polignac number, because 25953805251 - 2¹ = 25953805249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25953805197 and 25953805206.

It is not an unprimeable number, because it can be changed into a prime (25953805201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106260 + ... + 251393.

It is an arithmetic number, because the mean of its divisors is an integer number (1706367234).

Almost surely, 2^25953805251 is an apocalyptic number.

25953805251 is a deficient number, since it is larger than the sum of its proper divisors (14999008365).

25953805251 is a wasteful number, since it uses less digits than its factorization.

25953805251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358403 (or 358400 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 45.

The spelling of 25953805251 in words is "twenty-five billion, nine hundred fifty-three million, eight hundred five thousand, two hundred fifty-one".