22638045865 has 8 divisors (see below), whose sum is σ = 27213234048. Its totient is φ = 18078717360.

The previous prime is 22638045863. The next prime is 22638045883. The reversal of 22638045865 is 56854083622.

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

It is not a de Polignac number, because 22638045865 - 2¹ = 22638045863 is a prime.

It is a super-3 number, since 3×22638045865³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22638045863) 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, 3961777 + ... + 3967486.

It is an arithmetic number, because the mean of its divisors is an integer number (3401654256).

Almost surely, 2^22638045865 is an apocalyptic number.

It is an amenable number.

22638045865 is a deficient number, since it is larger than the sum of its proper divisors (4575188183).

22638045865 is an equidigital number, since it uses as much as digits as its factorization.

22638045865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7929839.

The product of its (nonzero) digits is 2764800, while the sum is 49.

The spelling of 22638045865 in words is "twenty-two billion, six hundred thirty-eight million, forty-five thousand, eight hundred sixty-five".