25630561651 has 8 divisors (see below), whose sum is σ = 27061054400. Its totient is φ = 24208220520.

The previous prime is 25630561643. The next prime is 25630561667. The reversal of 25630561651 is 15616503652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25630561651 - 2³ = 25630561643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25630568651) by changing a digit.

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, 2031441 + ... + 2044018.

It is an arithmetic number, because the mean of its divisors is an integer number (3382631800).

Almost surely, 2^25630561651 is an apocalyptic number.

25630561651 is a deficient number, since it is larger than the sum of its proper divisors (1430492749).

25630561651 is a wasteful number, since it uses less digits than its factorization.

25630561651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4075809.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 25630561651 in words is "twenty-five billion, six hundred thirty million, five hundred sixty-one thousand, six hundred fifty-one".