22156664621511 has 16 divisors (see below), whose sum is σ = 33762610782464. Its totient is φ = 12660923381184.

The previous prime is 22156664621477. The next prime is 22156664621573. The reversal of 22156664621511 is 11512646665122.

It is a happy number.

It is not a de Polignac number, because 22156664621511 - 2⁷ = 22156664621383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22156664121511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12201051 + ... + 13898883.

It is an arithmetic number, because the mean of its divisors is an integer number (2110163173904).

Almost surely, 2^{22156664621511} is an apocalyptic number.

22156664621511 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22156664621511 is a deficient number, since it is larger than the sum of its proper divisors (11605946160953).

22156664621511 is a wasteful number, since it uses less digits than its factorization.

22156664621511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319270.

The product of its digits is 1036800, while the sum is 48.

The spelling of 22156664621511 in words is "twenty-two trillion, one hundred fifty-six billion, six hundred sixty-four million, six hundred twenty-one thousand, five hundred eleven".