22172220776 has 16 divisors (see below), whose sum is σ = 41640302340. Its totient is φ = 11068140160.

The previous prime is 22172220761. The next prime is 22172220787. The reversal of 22172220776 is 67702227122.

It can be written as a sum of positive squares in 2 ways, for example, as 15869448676 + 6302772100 = 125974^2 + 79390^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2241035 + ... + 2250906.

Almost surely, 2^22172220776 is an apocalyptic number.

It is an amenable number.

22172220776 is a deficient number, since it is larger than the sum of its proper divisors (19468081564).

22172220776 is a wasteful number, since it uses less digits than its factorization.

22172220776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4492564 (or 4492560 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 38.

Adding to 22172220776 its reverse (67702227122), we get a palindrome (89874447898).

The spelling of 22172220776 in words is "twenty-two billion, one hundred seventy-two million, two hundred twenty thousand, seven hundred seventy-six".