561554764 has 12 divisors (see below), whose sum is σ = 992262544. Its totient is φ = 278051184.

The previous prime is 561554699. The next prime is 561554797. The reversal of 561554764 is 467455165.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 561554764.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681087 + ... + 681910.

Almost surely, 2^561554764 is an apocalyptic number.

It is an amenable number.

561554764 is a deficient number, since it is larger than the sum of its proper divisors (430707780).

561554764 is a wasteful number, since it uses less digits than its factorization.

561554764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363104 (or 1363102 counting only the distinct ones).

The product of its digits is 504000, while the sum is 43.

The square root of 561554764 is about 23697.1467480792. The cubic root of 561554764 is about 825.0191677212.

The spelling of 561554764 in words is "five hundred sixty-one million, five hundred fifty-four thousand, seven hundred sixty-four".