1963894366739 has 2 divisors, whose sum is σ = 1963894366740. Its totient is φ = 1963894366738.

The previous prime is 1963894366667. The next prime is 1963894366747. The reversal of 1963894366739 is 9376634983691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1963894366739 - 2⁴⁰ = 864382738963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1963894366789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 981947183369 + 981947183370.

It is an arithmetic number, because the mean of its divisors is an integer number (981947183370).

Almost surely, 2^{1963894366739} is an apocalyptic number.

1963894366739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1963894366739 is an equidigital number, since it uses as much as digits as its factorization.

1963894366739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952342272, while the sum is 74.

The spelling of 1963894366739 in words is "one trillion, nine hundred sixty-three billion, eight hundred ninety-four million, three hundred sixty-six thousand, seven hundred thirty-nine".