561672777778 has 8 divisors (see below), whose sum is σ = 962867619072. Its totient is φ = 240716904756.

The previous prime is 561672777769. The next prime is 561672777797. The reversal of 561672777778 is 877777276165.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20059742050 + ... + 20059742077.

It is an arithmetic number, because the mean of its divisors is an integer number (120358452384).

Almost surely, 2^561672777778 is an apocalyptic number.

561672777778 is a deficient number, since it is larger than the sum of its proper divisors (401194841294).

561672777778 is a wasteful number, since it uses less digits than its factorization.

561672777778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40119484136.

The product of its digits is 338829120, while the sum is 70.

The spelling of 561672777778 in words is "five hundred sixty-one billion, six hundred seventy-two million, seven hundred seventy-seven thousand, seven hundred seventy-eight".