221637506770264 has 16 divisors (see below), whose sum is σ = 447537273286320. Its totient is φ = 102294233893920.

The previous prime is 221637506770219. The next prime is 221637506770291. The reversal of 221637506770264 is 462077605736122.

It is a junction number, because it is equal to n+sod(n) for n = 221637506770199 and 221637506770208.

It is a congruent number.

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, 1065564936292 + ... + 1065564936499.

It is an arithmetic number, because the mean of its divisors is an integer number (27971079580395).

Almost surely, 2^{221637506770264} is an apocalyptic number.

It is an amenable number.

221637506770264 is an abundant number, since it is smaller than the sum of its proper divisors (225899766516056).

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

221637506770264 is a wasteful number, since it uses less digits than its factorization.

221637506770264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131129872810 (or 2131129872806 counting only the distinct ones).

The product of its (nonzero) digits is 35562240, while the sum is 58.

The spelling of 221637506770264 in words is "two hundred twenty-one trillion, six hundred thirty-seven billion, five hundred six million, seven hundred seventy thousand, two hundred sixty-four".