21772613264 has 20 divisors (see below), whose sum is σ = 42198541680. Its totient is φ = 10882667040.

The previous prime is 21772613263. The next prime is 21772613267. The reversal of 21772613264 is 46231627712.

It is not an unprimeable number, because it can be changed into a prime (21772613263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177794 + ... + 274145.

It is an arithmetic number, because the mean of its divisors is an integer number (2109927084).

Almost surely, 2^21772613264 is an apocalyptic number.

It is an amenable number.

21772613264 is a deficient number, since it is larger than the sum of its proper divisors (20425928416).

21772613264 is a wasteful number, since it uses less digits than its factorization.

21772613264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454958 (or 454952 counting only the distinct ones).

The product of its digits is 169344, while the sum is 41.

The spelling of 21772613264 in words is "twenty-one billion, seven hundred seventy-two million, six hundred thirteen thousand, two hundred sixty-four".