561672222778 has 8 divisors (see below), whose sum is σ = 871560345780. Its totient is φ = 271152107520.

The previous prime is 561672222763. The next prime is 561672222779. The reversal of 561672222778 is 877222276165.

It can be written as a sum of positive squares in 2 ways, for example, as 561649821489 + 22401289 = 749433^2 + 4733^2 .

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

It is not an unprimeable number, because it can be changed into a prime (561672222779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4842001863 + ... + 4842001978.

Almost surely, 2^561672222778 is an apocalyptic number.

561672222778 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

561672222778 is a deficient number, since it is larger than the sum of its proper divisors (309888123002).

561672222778 is a wasteful number, since it uses less digits than its factorization.

561672222778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9684003872.

The product of its digits is 7902720, while the sum is 55.

The spelling of 561672222778 in words is "five hundred sixty-one billion, six hundred seventy-two million, two hundred twenty-two thousand, seven hundred seventy-eight".