22815409857 has 8 divisors (see below), whose sum is σ = 30435741984. Its totient is φ = 15202675488.

The previous prime is 22815409831. The next prime is 22815409879. The reversal of 22815409857 is 75890451822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-22815409857 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (22815409807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1892428 + ... + 1904445.

It is an arithmetic number, because the mean of its divisors is an integer number (3804467748).

Almost surely, 2^22815409857 is an apocalyptic number.

It is an amenable number.

22815409857 is a deficient number, since it is larger than the sum of its proper divisors (7620332127).

22815409857 is a wasteful number, since it uses less digits than its factorization.

22815409857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3798879.

The product of its (nonzero) digits is 1612800, while the sum is 51.

The spelling of 22815409857 in words is "twenty-two billion, eight hundred fifteen million, four hundred nine thousand, eight hundred fifty-seven".