25671228240 has 80 divisors (see below), whose sum is σ = 90949500288. Its totient is φ = 5867708928.

The previous prime is 25671228239. The next prime is 25671228251. The reversal of 25671228240 is 4282217652.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7638567 + ... + 7641926.

Almost surely, 2^25671228240 is an apocalyptic number.

25671228240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25671228240 is an abundant number, since it is smaller than the sum of its proper divisors (65278272048).

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

25671228240 is a wasteful number, since it uses less digits than its factorization.

25671228240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15280516 (or 15280510 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The spelling of 25671228240 in words is "twenty-five billion, six hundred seventy-one million, two hundred twenty-eight thousand, two hundred forty".