221457705765064 has 32 divisors (see below), whose sum is σ = 422721712778400. Its totient is φ = 108735921590400.

The previous prime is 221457705765019. The next prime is 221457705765073. The reversal of 221457705765064 is 460567507754122.

It is a junction number, because it is equal to n+sod(n) for n = 221457705764993 and 221457705765011.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249925962 + ... + 250810489.

It is an arithmetic number, because the mean of its divisors is an integer number (13210053524325).

Almost surely, 2^{221457705765064} is an apocalyptic number.

It is an amenable number.

221457705765064 is a deficient number, since it is larger than the sum of its proper divisors (201264007013336).

221457705765064 is a wasteful number, since it uses less digits than its factorization.

221457705765064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500737453 (or 500737449 counting only the distinct ones).

The product of its (nonzero) digits is 98784000, while the sum is 61.

The spelling of 221457705765064 in words is "two hundred twenty-one trillion, four hundred fifty-seven billion, seven hundred five million, seven hundred sixty-five thousand, sixty-four".