221554045404 has 72 divisors (see below), whose sum is σ = 561182935040. Its totient is φ = 73700710272.

The previous prime is 221554045403. The next prime is 221554045469. The reversal of 221554045404 is 404540455122.

221554045404 is a `hidden beast` number, since 2 + 21 + 55 + 40 + 4 + 540 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221554045403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61832997 + ... + 61836579.

Almost surely, 2^221554045404 is an apocalyptic number.

It is an amenable number.

221554045404 is an abundant number, since it is smaller than the sum of its proper divisors (339628889636).

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

221554045404 is a wasteful number, since it uses less digits than its factorization.

221554045404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6619 (or 6614 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 36.

The spelling of 221554045404 in words is "two hundred twenty-one billion, five hundred fifty-four million, forty-five thousand, four hundred four".