15974139760717 has 2 divisors, whose sum is σ = 15974139760718. Its totient is φ = 15974139760716.

The previous prime is 15974139760693. The next prime is 15974139760729. The reversal of 15974139760717 is 71706793147951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11602239314436 + 4371900446281 = 3406206^2 + 2090909^2 .

It is a cyclic number.

It is not a de Polignac number, because 15974139760717 - 2¹¹ = 15974139758669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15974139769717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7987069880358 + 7987069880359.

It is an arithmetic number, because the mean of its divisors is an integer number (7987069880359).

Almost surely, 2^{15974139760717} is an apocalyptic number.

It is an amenable number.

15974139760717 is a deficient number, since it is larger than the sum of its proper divisors (1).

15974139760717 is an equidigital number, since it uses as much as digits as its factorization.

15974139760717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70013160, while the sum is 67.

The spelling of 15974139760717 in words is "fifteen trillion, nine hundred seventy-four billion, one hundred thirty-nine million, seven hundred sixty thousand, seven hundred seventeen".