1561567101539 has 2 divisors, whose sum is σ = 1561567101540. Its totient is φ = 1561567101538.

The previous prime is 1561567101463. The next prime is 1561567101551. The reversal of 1561567101539 is 9351017651651.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1561567101539 is a prime.

It is a super-3 number, since 3×1561567101539³ (a number of 38 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1561567101839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780783550769 + 780783550770.

It is an arithmetic number, because the mean of its divisors is an integer number (780783550770).

Almost surely, 2^{1561567101539} is an apocalyptic number.

1561567101539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1561567101539 is an equidigital number, since it uses as much as digits as its factorization.

1561567101539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 850500, while the sum is 50.

The spelling of 1561567101539 in words is "one trillion, five hundred sixty-one billion, five hundred sixty-seven million, one hundred one thousand, five hundred thirty-nine".