25989220040 has 64 divisors (see below), whose sum is σ = 67272111360. Its totient is φ = 8851564800.

The previous prime is 25989220021. The next prime is 25989220099. The reversal of 25989220040 is 4002298952.

It is a self number, because there is not a number n which added to its sum of digits gives 25989220040.

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, 265067 + ... + 349626.

It is an arithmetic number, because the mean of its divisors is an integer number (1051126740).

Almost surely, 2^25989220040 is an apocalyptic number.

25989220040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25989220040 is an abundant number, since it is smaller than the sum of its proper divisors (41282891320).

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

25989220040 is a wasteful number, since it uses less digits than its factorization.

25989220040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614862 (or 614858 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 25989220040 in words is "twenty-five billion, nine hundred eighty-nine million, two hundred twenty thousand, forty".