23502565540 has 48 divisors (see below), whose sum is σ = 49855439088. Its totient is φ = 9306251264.

The previous prime is 23502565529. The next prime is 23502565601. The reversal of 23502565540 is 4556520532.

It can be written as a sum of positive squares in 8 ways, for example, as 2331151524 + 21171414016 = 48282^2 + 145504^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23502565540.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 791604 + ... + 820756.

It is an arithmetic number, because the mean of its divisors is an integer number (1038654981).

Almost surely, 2^23502565540 is an apocalyptic number.

23502565540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23502565540 is an abundant number, since it is smaller than the sum of its proper divisors (26352873548).

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

23502565540 is a wasteful number, since it uses less digits than its factorization.

23502565540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29568 (or 29566 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 37.

The spelling of 23502565540 in words is "twenty-three billion, five hundred two million, five hundred sixty-five thousand, five hundred forty".