25656632610 has 64 divisors (see below), whose sum is σ = 72642576384. Its totient is φ = 5675198400.

The previous prime is 25656632609. The next prime is 25656632627. The reversal of 25656632610 is 1623665652.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1964046 + ... + 1977065.

It is an arithmetic number, because the mean of its divisors is an integer number (1135040256).

Almost surely, 2^25656632610 is an apocalyptic number.

25656632610 is an abundant number, since it is smaller than the sum of its proper divisors (46985943774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25656632610 is a wasteful number, since it uses less digits than its factorization.

25656632610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3941159.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 25656632610 in words is "twenty-five billion, six hundred fifty-six million, six hundred thirty-two thousand, six hundred ten".