25291863480 has 128 divisors (see below), whose sum is σ = 81956347200. Its totient is φ = 6207086592.

The previous prime is 25291863469. The next prime is 25291863529. The reversal of 25291863480 is 8436819252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 501666 + ... + 549774.

Almost surely, 2^25291863480 is an apocalyptic number.

25291863480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25291863480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40978173600).

25291863480 is an abundant number, since it is smaller than the sum of its proper divisors (56664483720).

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

25291863480 is a wasteful number, since it uses less digits than its factorization.

25291863480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48473 (or 48469 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 25291863480 in words is "twenty-five billion, two hundred ninety-one million, eight hundred sixty-three thousand, four hundred eighty".