221656355711346 has 32 divisors (see below), whose sum is σ = 455073912264960. Its totient is φ = 71950875295104.

The previous prime is 221656355711327. The next prime is 221656355711377. The reversal of 221656355711346 is 643117553656122.

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, 3202906785 + ... + 3202975988.

It is an arithmetic number, because the mean of its divisors is an integer number (14221059758280).

Almost surely, 2^{221656355711346} is an apocalyptic number.

221656355711346 is an abundant number, since it is smaller than the sum of its proper divisors (233417556553614).

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

221656355711346 is a wasteful number, since it uses less digits than its factorization.

221656355711346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6405882930.

The product of its digits is 27216000, while the sum is 57.

The spelling of 221656355711346 in words is "two hundred twenty-one trillion, six hundred fifty-six billion, three hundred fifty-five million, seven hundred eleven thousand, three hundred forty-six".