561672778392 has 80 divisors (see below), whose sum is σ = 1716222400200. Its totient is φ = 170203870080.

The previous prime is 561672778367. The next prime is 561672778427. The reversal of 561672778392 is 293877276165.

561672778392 is a `hidden beast` number, since 5 + 616 + 7 + 2 + 7 + 7 + 8 + 3 + 9 + 2 = 666.

It is a hoax number, since the sum of its digits (63) 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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39391917 + ... + 39406172.

Almost surely, 2^561672778392 is an apocalyptic number.

It is an amenable number.

561672778392 is an abundant number, since it is smaller than the sum of its proper divisors (1154549621808).

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

561672778392 is a wasteful number, since it uses less digits than its factorization.

561672778392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78798118 (or 78798105 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 63.

The spelling of 561672778392 in words is "five hundred sixty-one billion, six hundred seventy-two million, seven hundred seventy-eight thousand, three hundred ninety-two".