1391814403361 has 2 divisors, whose sum is σ = 1391814403362. Its totient is φ = 1391814403360.

The previous prime is 1391814403337. The next prime is 1391814403379. The reversal of 1391814403361 is 1633044181931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1224218325136 + 167596078225 = 1106444^2 + 409385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1391814403361 - 2⁶ = 1391814403297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1391214403361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695907201680 + 695907201681.

It is an arithmetic number, because the mean of its divisors is an integer number (695907201681).

Almost surely, 2^{1391814403361} is an apocalyptic number.

It is an amenable number.

1391814403361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391814403361 is an equidigital number, since it uses as much as digits as its factorization.

1391814403361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 1391814403361 in words is "one trillion, three hundred ninety-one billion, eight hundred fourteen million, four hundred three thousand, three hundred sixty-one".