1561076139319 has 2 divisors, whose sum is σ = 1561076139320. Its totient is φ = 1561076139318.

The previous prime is 1561076139317. The next prime is 1561076139323. The reversal of 1561076139319 is 9139316701651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1561076139319 - 2¹ = 1561076139317 is a prime.

It is a super-2 number, since 2×1561076139319² (a number of 25 digits) contains 22 as substring.

Together with 1561076139317, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1561076139317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780538069659 + 780538069660.

It is an arithmetic number, because the mean of its divisors is an integer number (780538069660).

Almost surely, 2^{1561076139319} is an apocalyptic number.

1561076139319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1561076139319 is an equidigital number, since it uses as much as digits as its factorization.

1561076139319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 918540, while the sum is 52.

The spelling of 1561076139319 in words is "one trillion, five hundred sixty-one billion, seventy-six million, one hundred thirty-nine thousand, three hundred nineteen".