22544515540 has 24 divisors (see below), whose sum is σ = 47992026600. Its totient is φ = 8894274048.

The previous prime is 22544515519. The next prime is 22544515573. The reversal of 22544515540 is 4551544522.

It can be written as a sum of positive squares in 4 ways, for example, as 93636 + 22544421904 = 306^2 + 150148^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22544515540.

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, 7719265 + ... + 7722184.

It is an arithmetic number, because the mean of its divisors is an integer number (1999667775).

Almost surely, 2^22544515540 is an apocalyptic number.

22544515540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22544515540 is an abundant number, since it is smaller than the sum of its proper divisors (25447511060).

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

22544515540 is a wasteful number, since it uses less digits than its factorization.

22544515540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15441531 (or 15441529 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 37.

The spelling of 22544515540 in words is "twenty-two billion, five hundred forty-four million, five hundred fifteen thousand, five hundred forty".