25618469648 has 10 divisors (see below), whose sum is σ = 49635784974. Its totient is φ = 12809234816.

The previous prime is 25618469629. The next prime is 25618469659. The reversal of 25618469648 is 84696481652.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25559056384 + 59413264 = 159872^2 + 7708^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800577161 + ... + 800577192.

Almost surely, 2^25618469648 is an apocalyptic number.

It is an amenable number.

25618469648 is a deficient number, since it is larger than the sum of its proper divisors (24017315326).

25618469648 is a wasteful number, since it uses less digits than its factorization.

25618469648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601154361 (or 1601154355 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 59.

The spelling of 25618469648 in words is "twenty-five billion, six hundred eighteen million, four hundred sixty-nine thousand, six hundred forty-eight".