22615570440 has 64 divisors (see below), whose sum is σ = 75385238400. Its totient is φ = 6030818496.

The previous prime is 22615570391. The next prime is 22615570487. The reversal of 22615570440 is 4407551622.

It is a happy number.

22615570440 is a `hidden beast` number, since 2 + 2 + 61 + 557 + 0 + 4 + 40 = 666.

It is a super-2 number, since 2×22615570440² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 22615570395 and 22615570404.

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, 10469092 + ... + 10471251.

It is an arithmetic number, because the mean of its divisors is an integer number (1177894350).

Almost surely, 2^22615570440 is an apocalyptic number.

22615570440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22615570440 is an abundant number, since it is smaller than the sum of its proper divisors (52769667960).

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

22615570440 is a wasteful number, since it uses less digits than its factorization.

22615570440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20940363 (or 20940353 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The spelling of 22615570440 in words is "twenty-two billion, six hundred fifteen million, five hundred seventy thousand, four hundred forty".