1561010050139 has 2 divisors, whose sum is σ = 1561010050140. Its totient is φ = 1561010050138.

The previous prime is 1561010050121. The next prime is 1561010050247. The reversal of 1561010050139 is 9310500101651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1561010050139 - 2³² = 1556715082843 is a prime.

It is not a weakly prime, because it can be changed into another prime (1561010250139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780505025069 + 780505025070.

It is an arithmetic number, because the mean of its divisors is an integer number (780505025070).

Almost surely, 2^{1561010050139} is an apocalyptic number.

1561010050139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1561010050139 is an equidigital number, since it uses as much as digits as its factorization.

1561010050139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 32.

The spelling of 1561010050139 in words is "one trillion, five hundred sixty-one billion, ten million, fifty thousand, one hundred thirty-nine".