221533664415564 has 24 divisors (see below), whose sum is σ = 516914791138368. Its totient is φ = 73844139447760.

The previous prime is 221533664415517. The next prime is 221533664415593. The reversal of 221533664415564 is 465514466335122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49693542 + ... + 53967725.

It is an arithmetic number, because the mean of its divisors is an integer number (21538116297432).

Almost surely, 2^{221533664415564} is an apocalyptic number.

It is an amenable number.

221533664415564 is an abundant number, since it is smaller than the sum of its proper divisors (295381126722804).

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

221533664415564 is a wasteful number, since it uses less digits than its factorization.

221533664415564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103839365 (or 103839363 counting only the distinct ones).

The product of its digits is 62208000, while the sum is 57.

The spelling of 221533664415564 in words is "two hundred twenty-one trillion, five hundred thirty-three billion, six hundred sixty-four million, four hundred fifteen thousand, five hundred sixty-four".