21622677156 has 18 divisors (see below), whose sum is σ = 54657322902. Its totient is φ = 7207559040.

The previous prime is 21622677133. The next prime is 21622677157. The reversal of 21622677156 is 65177622612.

21622677156 is a `hidden beast` number, since 2 + 1 + 622 + 6 + 7 + 7 + 15 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17297510400 + 4325166756 = 131520^2 + 65766^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (21622677157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 300314925 + ... + 300314996.

It is an arithmetic number, because the mean of its divisors is an integer number (3036517939).

Almost surely, 2^21622677156 is an apocalyptic number.

It is an amenable number.

21622677156 is an abundant number, since it is smaller than the sum of its proper divisors (33034645746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21622677156 is a wasteful number, since it uses less digits than its factorization.

21622677156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600629931 (or 600629926 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The spelling of 21622677156 in words is "twenty-one billion, six hundred twenty-two million, six hundred seventy-seven thousand, one hundred fifty-six".