25543980240 has 40 divisors (see below), whose sum is σ = 79186339488. Its totient is φ = 6811728000.

The previous prime is 25543980239. The next prime is 25543980271. The reversal of 25543980240 is 4208934552.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 25543980192 and 25543980201.

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, 53216386 + ... + 53216865.

Almost surely, 2^25543980240 is an apocalyptic number.

25543980240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25543980240 is an abundant number, since it is smaller than the sum of its proper divisors (53642359248).

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

25543980240 is a wasteful number, since it uses less digits than its factorization.

25543980240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106433267 (or 106433261 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 25543980240 in words is "twenty-five billion, five hundred forty-three million, nine hundred eighty thousand, two hundred forty".