561667278339 has 12 divisors (see below), whose sum is σ = 859020543576. Its totient is φ = 352418684352.

The previous prime is 561667278323. The next prime is 561667278343. The reversal of 561667278339 is 933872766165.

561667278339 is a `hidden beast` number, since 5 + 6 + 166 + 72 + 78 + 339 = 666.

It is not a de Polignac number, because 561667278339 - 2⁴ = 561667278323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561667278379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1835513829 + ... + 1835514134.

It is an arithmetic number, because the mean of its divisors is an integer number (71585045298).

Almost surely, 2^561667278339 is an apocalyptic number.

561667278339 is a deficient number, since it is larger than the sum of its proper divisors (297353265237).

561667278339 is a wasteful number, since it uses less digits than its factorization.

561667278339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3671027986 (or 3671027983 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 63.

The spelling of 561667278339 in words is "five hundred sixty-one billion, six hundred sixty-seven million, two hundred seventy-eight thousand, three hundred thirty-nine".