220964894642 has 18 divisors (see below), whose sum is σ = 337031831799. Its totient is φ = 108651316320.

The previous prime is 220964894629. The next prime is 220964894687. The reversal of 220964894642 is 246498469022.

It can be written as a sum of positive squares in 5 ways, for example, as 16517133361 + 204447761281 = 128519^2 + 452159^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332389.

It is a Duffinian number.

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, 40548734 + ... + 40554182.

Almost surely, 2^220964894642 is an apocalyptic number.

220964894642 is a deficient number, since it is larger than the sum of its proper divisors (116066937157).

220964894642 is an frugal number, since it uses more digits than its factorization.

220964894642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11022 (or 5512 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 56.

The spelling of 220964894642 in words is "two hundred twenty billion, nine hundred sixty-four million, eight hundred ninety-four thousand, six hundred forty-two".