561672778367 has 2 divisors, whose sum is σ = 561672778368. Its totient is φ = 561672778366.

The previous prime is 561672778361. The next prime is 561672778427. The reversal of 561672778367 is 763877276165.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561672778367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561672778361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280836389183 + 280836389184.

It is an arithmetic number, because the mean of its divisors is an integer number (280836389184).

Almost surely, 2^561672778367 is an apocalyptic number.

561672778367 is a deficient number, since it is larger than the sum of its proper divisors (1).

561672778367 is an equidigital number, since it uses as much as digits as its factorization.

561672778367 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124467840, while the sum is 65.

The spelling of 561672778367 in words is "five hundred sixty-one billion, six hundred seventy-two million, seven hundred seventy-eight thousand, three hundred sixty-seven".