561128445 has 16 divisors (see below), whose sum is σ = 997561920. Its totient is φ = 299268432.

The previous prime is 561128431. The next prime is 561128479. The reversal of 561128445 is 544821165.

It is a happy number.

561128445 is a `hidden beast` number, since 561 + 12 + 84 + 4 + 5 = 666.

It is not a de Polignac number, because 561128445 - 2⁴ = 561128429 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 2078119 + ... + 2078388.

It is an arithmetic number, because the mean of its divisors is an integer number (62347620).

Almost surely, 2^561128445 is an apocalyptic number.

It is an amenable number.

561128445 is a deficient number, since it is larger than the sum of its proper divisors (436433475).

561128445 is a wasteful number, since it uses less digits than its factorization.

561128445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4156521 (or 4156515 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 561128445 is about 23688.1498855440. The cubic root of 561128445 is about 824.8103365659.

The spelling of 561128445 in words is "five hundred sixty-one million, one hundred twenty-eight thousand, four hundred forty-five".