561287688194 has 16 divisors (see below), whose sum is σ = 854553950208. Its totient is φ = 276436923312.

The previous prime is 561287688083. The next prime is 561287688217. The reversal of 561287688194 is 491886782165.

It is a self number, because there is not a number n which added to its sum of digits gives 561287688194.

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, 2031152 + ... + 2290884.

It is an arithmetic number, because the mean of its divisors is an integer number (53409621888).

Almost surely, 2^561287688194 is an apocalyptic number.

561287688194 is a deficient number, since it is larger than the sum of its proper divisors (293266262014).

561287688194 is a wasteful number, since it uses less digits than its factorization.

561287688194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275929.

The product of its digits is 46448640, while the sum is 65.

The spelling of 561287688194 in words is "five hundred sixty-one billion, two hundred eighty-seven million, six hundred eighty-eight thousand, one hundred ninety-four".