25606488642 has 16 divisors (see below), whose sum is σ = 58529116992. Its totient is φ = 7316139600.

The previous prime is 25606488637. The next prime is 25606488707. The reversal of 25606488642 is 24688460652.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304839109 + ... + 304839192.

It is an arithmetic number, because the mean of its divisors is an integer number (3658069812).

Almost surely, 2^25606488642 is an apocalyptic number.

25606488642 is an abundant number, since it is smaller than the sum of its proper divisors (32922628350).

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

25606488642 is a wasteful number, since it uses less digits than its factorization.

25606488642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609678313.

The product of its (nonzero) digits is 4423680, while the sum is 51.

The spelling of 25606488642 in words is "twenty-five billion, six hundred six million, four hundred eighty-eight thousand, six hundred forty-two".