221187648964 has 12 divisors (see below), whose sum is σ = 388226988604. Its totient is φ = 110265652224.

The previous prime is 221187648953. The next prime is 221187648989. The reversal of 221187648964 is 469846781122.

It can be written as a sum of positive squares in 2 ways, for example, as 139995705600 + 81191943364 = 374160^2 + 284942^2 .

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 221187648899 and 221187648908.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82041549 + ... + 82044244.

Almost surely, 2^221187648964 is an apocalyptic number.

It is an amenable number.

221187648964 is a deficient number, since it is larger than the sum of its proper divisors (167039339640).

221187648964 is a wasteful number, since it uses less digits than its factorization.

221187648964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164086134 (or 164086132 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 58.

The spelling of 221187648964 in words is "two hundred twenty-one billion, one hundred eighty-seven million, six hundred forty-eight thousand, nine hundred sixty-four".