22158563657 has 8 divisors (see below), whose sum is σ = 23463438336. Its totient is φ = 20853847872.

The previous prime is 22158563641. The next prime is 22158563731. The reversal of 22158563657 is 75636585122.

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

It is a cyclic number.

It is not a de Polignac number, because 22158563657 - 2⁴ = 22158563641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22158563617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365708 + ... + 421970.

It is an arithmetic number, because the mean of its divisors is an integer number (2932929792).

Almost surely, 2^22158563657 is an apocalyptic number.

It is an amenable number.

22158563657 is a deficient number, since it is larger than the sum of its proper divisors (1304874679).

22158563657 is a wasteful number, since it uses less digits than its factorization.

22158563657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79447.

The product of its digits is 3024000, while the sum is 50.

The spelling of 22158563657 in words is "twenty-two billion, one hundred fifty-eight million, five hundred sixty-three thousand, six hundred fifty-seven".