221657162744440 has 64 divisors (see below), whose sum is σ = 506791473154560. Its totient is φ = 87234596749440.

The previous prime is 221657162744431. The next prime is 221657162744467. The reversal of 221657162744440 is 44447261756122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78748642 + ... + 81514801.

It is an arithmetic number, because the mean of its divisors is an integer number (7918616768040).

Almost surely, 2^{221657162744440} is an apocalyptic number.

221657162744440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221657162744440 is an abundant number, since it is smaller than the sum of its proper divisors (285134310410120).

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

221657162744440 is a wasteful number, since it uses less digits than its factorization.

221657162744440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160264012 (or 160264008 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 55.

The spelling of 221657162744440 in words is "two hundred twenty-one trillion, six hundred fifty-seven billion, one hundred sixty-two million, seven hundred forty-four thousand, four hundred forty".