221044795776 has 160 divisors (see below), whose sum is σ = 751801081680. Its totient is φ = 63155635200.

The previous prime is 221044795747. The next prime is 221044795787. The reversal of 221044795776 is 677597440122.

221044795776 is a `hidden beast` number, since 2 + 21 + 0 + 4 + 47 + 9 + 577 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1450275 + ... + 1595426.

Almost surely, 2^221044795776 is an apocalyptic number.

It is an amenable number.

221044795776 is an abundant number, since it is smaller than the sum of its proper divisors (530756285904).

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

221044795776 is an equidigital number, since it uses as much as digits as its factorization.

221044795776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3045734 (or 3045713 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 54.

The spelling of 221044795776 in words is "two hundred twenty-one billion, forty-four million, seven hundred ninety-five thousand, seven hundred seventy-six".