25523657340 has 24 divisors (see below), whose sum is σ = 71466240720. Its totient is φ = 6806308608.

The previous prime is 25523657321. The next prime is 25523657371. The reversal of 25523657340 is 4375632552.

It is a junction number, because it is equal to n+sod(n) for n = 25523657292 and 25523657301.

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, 212697085 + ... + 212697204.

It is an arithmetic number, because the mean of its divisors is an integer number (2977760030).

Almost surely, 2^25523657340 is an apocalyptic number.

25523657340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25523657340 is an abundant number, since it is smaller than the sum of its proper divisors (45942583380).

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

25523657340 is a wasteful number, since it uses less digits than its factorization.

25523657340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425394301 (or 425394299 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 42.

The spelling of 25523657340 in words is "twenty-five billion, five hundred twenty-three million, six hundred fifty-seven thousand, three hundred forty".