221777104890 has 32 divisors (see below), whose sum is σ = 580652784576. Its totient is φ = 53764146560.

The previous prime is 221777104877. The next prime is 221777104907. The reversal of 221777104890 is 98401777122.

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, 336025587 + ... + 336026246.

It is an arithmetic number, because the mean of its divisors is an integer number (18145399518).

Almost surely, 2^221777104890 is an apocalyptic number.

221777104890 is an abundant number, since it is smaller than the sum of its proper divisors (358875679686).

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

221777104890 is a wasteful number, since it uses less digits than its factorization.

221777104890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672051854.

The product of its (nonzero) digits is 395136, while the sum is 48.

The spelling of 221777104890 in words is "two hundred twenty-one billion, seven hundred seventy-seven million, one hundred four thousand, eight hundred ninety".