25058656640 has 64 divisors (see below), whose sum is σ = 59937798960. Its totient is φ = 10018117632.

The previous prime is 25058656631. The next prime is 25058656657. The reversal of 25058656640 is 4665685052.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1323722 + ... + 1342518.

Almost surely, 2^25058656640 is an apocalyptic number.

25058656640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25058656640 is an abundant number, since it is smaller than the sum of its proper divisors (34879142320).

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

25058656640 is a wasteful number, since it uses less digits than its factorization.

25058656640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20899 (or 20887 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 25058656640 in words is "twenty-five billion, fifty-eight million, six hundred fifty-six thousand, six hundred forty".