561378237319 has 2 divisors, whose sum is σ = 561378237320. Its totient is φ = 561378237318.

The previous prime is 561378237317. The next prime is 561378237331. The reversal of 561378237319 is 913732873165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561378237319 - 2¹ = 561378237317 is a prime.

It is a super-2 number, since 2×561378237319² (a number of 24 digits) contains 22 as substring.

Together with 561378237317, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 561378237319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561378237311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280689118659 + 280689118660.

It is an arithmetic number, because the mean of its divisors is an integer number (280689118660).

Almost surely, 2^561378237319 is an apocalyptic number.

561378237319 is a deficient number, since it is larger than the sum of its proper divisors (1).

561378237319 is an equidigital number, since it uses as much as digits as its factorization.

561378237319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5715360, while the sum is 55.

The spelling of 561378237319 in words is "five hundred sixty-one billion, three hundred seventy-eight million, two hundred thirty-seven thousand, three hundred nineteen".