1961601570839 has 2 divisors, whose sum is σ = 1961601570840. Its totient is φ = 1961601570838.

The previous prime is 1961601570821. The next prime is 1961601570871. The reversal of 1961601570839 is 9380751061691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1961601570839 - 2⁸ = 1961601570583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1961601570889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980800785419 + 980800785420.

It is an arithmetic number, because the mean of its divisors is an integer number (980800785420).

Almost surely, 2^{1961601570839} is an apocalyptic number.

1961601570839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961601570839 is an equidigital number, since it uses as much as digits as its factorization.

1961601570839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 56.

The spelling of 1961601570839 in words is "one trillion, nine hundred sixty-one billion, six hundred one million, five hundred seventy thousand, eight hundred thirty-nine".