561172778395 has 8 divisors (see below), whose sum is σ = 713019530304. Its totient is φ = 422530091904.

The previous prime is 561172778351. The next prime is 561172778407. The reversal of 561172778395 is 593877271165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561172778395 - 2²⁵ = 561139223963 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3301016259 + ... + 3301016428.

It is an arithmetic number, because the mean of its divisors is an integer number (89127441288).

Almost surely, 2^561172778395 is an apocalyptic number.

561172778395 is a deficient number, since it is larger than the sum of its proper divisors (151846751909).

561172778395 is a wasteful number, since it uses less digits than its factorization.

561172778395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6602032709.

The product of its digits is 22226400, while the sum is 61.

The spelling of 561172778395 in words is "five hundred sixty-one billion, one hundred seventy-two million, seven hundred seventy-eight thousand, three hundred ninety-five".