22108161779 has 16 divisors (see below), whose sum is σ = 24984075264. Its totient is φ = 19381183200.

The previous prime is 22108161743. The next prime is 22108161793. The reversal of 22108161779 is 97716180122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22108161779 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22108161709) 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, 18044 + ... + 211049.

It is an arithmetic number, because the mean of its divisors is an integer number (1561504704).

Almost surely, 2^22108161779 is an apocalyptic number.

22108161779 is a deficient number, since it is larger than the sum of its proper divisors (2875913485).

22108161779 is a wasteful number, since it uses less digits than its factorization.

22108161779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229418.

The product of its (nonzero) digits is 84672, while the sum is 44.

It can be divided in two parts, 22 and 108161779, that added together give a palindrome (108161801).

The spelling of 22108161779 in words is "twenty-two billion, one hundred eight million, one hundred sixty-one thousand, seven hundred seventy-nine".