561678338899 has 2 divisors, whose sum is σ = 561678338900. Its totient is φ = 561678338898.

The previous prime is 561678338873. The next prime is 561678338909. The reversal of 561678338899 is 998833876165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561678338899 - 2³³ = 553088404307 is a prime.

It is not a weakly prime, because it can be changed into another prime (561678338999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280839169449 + 280839169450.

It is an arithmetic number, because the mean of its divisors is an integer number (280839169450).

Almost surely, 2^561678338899 is an apocalyptic number.

561678338899 is a deficient number, since it is larger than the sum of its proper divisors (1).

561678338899 is an equidigital number, since it uses as much as digits as its factorization.

561678338899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 470292480, while the sum is 73.

The spelling of 561678338899 in words is "five hundred sixty-one billion, six hundred seventy-eight million, three hundred thirty-eight thousand, eight hundred ninety-nine".