22222615681 has 8 divisors (see below), whose sum is σ = 25915587200. Its totient is φ = 19047956004.

The previous prime is 22222615673. The next prime is 22222615691. The reversal of 22222615681 is 18651622222.

It is not a de Polignac number, because 22222615681 - 2³ = 22222615673 is a prime.

It is a super-2 number, since 2×22222615681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22222615681.

It is not an unprimeable number, because it can be changed into a prime (22222615691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32394141 + ... + 32394826.

It is an arithmetic number, because the mean of its divisors is an integer number (3239448400).

Almost surely, 2^22222615681 is an apocalyptic number.

It is an amenable number.

22222615681 is a deficient number, since it is larger than the sum of its proper divisors (3692971519).

22222615681 is an frugal number, since it uses more digits than its factorization.

22222615681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64788988 (or 64788974 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The spelling of 22222615681 in words is "twenty-two billion, two hundred twenty-two million, six hundred fifteen thousand, six hundred eighty-one".