21552616962 has 18 divisors (see below), whose sum is σ = 46698686307. Its totient is φ = 7183998036.

The previous prime is 21552616927. The next prime is 21552616991. The reversal of 21552616962 is 26961625512.

21552616962 is a `hidden beast` number, since 2 + 1 + 5 + 526 + 1 + 69 + 62 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10776308481 + 10776308481 = 103809^2 + 103809^2 .

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

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=103809.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 605553 + ... + 640155.

Almost surely, 2^21552616962 is an apocalyptic number.

21552616962 is an abundant number, since it is smaller than the sum of its proper divisors (25146069345).

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

21552616962 is an frugal number, since it uses more digits than its factorization.

21552616962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69214 (or 34608 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The spelling of 21552616962 in words is "twenty-one billion, five hundred fifty-two million, six hundred sixteen thousand, nine hundred sixty-two".