22021562641664 has 72 divisors (see below), whose sum is σ = 44000082273672. Its totient is φ = 11000020008960.

The previous prime is 22021562641621. The next prime is 22021562641679. The reversal of 22021562641664 is 46614626512022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4018581529600 + 18002981112064 = 2004640^2 + 4242992^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2755102052 + ... + 2755110044.

It is an arithmetic number, because the mean of its divisors is an integer number (611112253801).

Almost surely, 2^{22021562641664} is an apocalyptic number.

It is an amenable number.

22021562641664 is a deficient number, since it is larger than the sum of its proper divisors (21978519632008).

22021562641664 is an equidigital number, since it uses as much as digits as its factorization.

22021562641664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17183 (or 17169 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 22021562641664 in words is "twenty-two trillion, twenty-one billion, five hundred sixty-two million, six hundred forty-one thousand, six hundred sixty-four".