221745017435860 has 192 divisors, whose sum is σ = 491592312078336. Its totient is φ = 83941900761600.

The previous prime is 221745017435857. The next prime is 221745017435861. The reversal of 221745017435860 is 68534710547122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221745017435861) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1412607097 + ... + 1412764063.

It is an arithmetic number, because the mean of its divisors is an integer number (2560376625408).

Almost surely, 2^{221745017435860} is an apocalyptic number.

221745017435860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221745017435860 is an abundant number, since it is smaller than the sum of its proper divisors (269847294642476).

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

221745017435860 is a wasteful number, since it uses less digits than its factorization.

221745017435860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157502 (or 157500 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 55.

The spelling of 221745017435860 in words is "two hundred twenty-one trillion, seven hundred forty-five billion, seventeen million, four hundred thirty-five thousand, eight hundred sixty".