561055404 has 96 divisors (see below), whose sum is σ = 1627508736. Its totient is φ = 146476800.

The previous prime is 561055361. The next prime is 561055423. The reversal of 561055404 is 404550165.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107749 + ... + 112835.

It is an arithmetic number, because the mean of its divisors is an integer number (16953216).

Almost surely, 2^561055404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561055404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (813754368).

561055404 is an abundant number, since it is smaller than the sum of its proper divisors (1066453332).

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

561055404 is a wasteful number, since it uses less digits than its factorization.

561055404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5215 (or 5213 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 561055404 is about 23686.6081151354. The cubic root of 561055404 is about 824.7745470264.

The spelling of 561055404 in words is "five hundred sixty-one million, fifty-five thousand, four hundred four".