221535257074764 has 48 divisors (see below), whose sum is σ = 548036228611200. Its totient is φ = 69455203646976.

The previous prime is 221535257074759. The next prime is 221535257074801. The reversal of 221535257074764 is 467470752535122.

It is a junction number, because it is equal to n+sod(n) for n = 221535257074698 and 221535257074707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3495097317 + ... + 3495160700.

It is an arithmetic number, because the mean of its divisors is an integer number (11417421429400).

Almost surely, 2^{221535257074764} is an apocalyptic number.

It is an amenable number.

221535257074764 is an abundant number, since it is smaller than the sum of its proper divisors (326500971536436).

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

221535257074764 is a wasteful number, since it uses less digits than its factorization.

221535257074764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6990258182 (or 6990258180 counting only the distinct ones).

The product of its (nonzero) digits is 98784000, while the sum is 60.

The spelling of 221535257074764 in words is "two hundred twenty-one trillion, five hundred thirty-five billion, two hundred fifty-seven million, seventy-four thousand, seven hundred sixty-four".