25627642644 has 12 divisors (see below), whose sum is σ = 59797832864. Its totient is φ = 8542547544.

The previous prime is 25627642639. The next prime is 25627642661. The reversal of 25627642644 is 44624672652.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 25627642593 and 25627642602.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1067818432 + ... + 1067818455.

Almost surely, 2^25627642644 is an apocalyptic number.

It is an amenable number.

25627642644 is an abundant number, since it is smaller than the sum of its proper divisors (34170190220).

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

25627642644 is a wasteful number, since it uses less digits than its factorization.

25627642644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135636894 (or 2135636892 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 48.

The spelling of 25627642644 in words is "twenty-five billion, six hundred twenty-seven million, six hundred forty-two thousand, six hundred forty-four".