561582368378 has 4 divisors (see below), whose sum is σ = 842373552570. Its totient is φ = 280791184188.

The previous prime is 561582368351. The next prime is 561582368387. The reversal of 561582368378 is 873863285165.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 560271711169 + 1310657209 = 748513^2 + 36203^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 561582368378.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140395592093 + ... + 140395592096.

Almost surely, 2^561582368378 is an apocalyptic number.

561582368378 is a deficient number, since it is larger than the sum of its proper divisors (280791184192).

561582368378 is a wasteful number, since it uses less digits than its factorization.

561582368378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280791184191.

The product of its digits is 58060800, while the sum is 62.

The spelling of 561582368378 in words is "five hundred sixty-one billion, five hundred eighty-two million, three hundred sixty-eight thousand, three hundred seventy-eight".