1599662979697 has 2 divisors, whose sum is σ = 1599662979698. Its totient is φ = 1599662979696.

The previous prime is 1599662979679. The next prime is 1599662979703. The reversal of 1599662979697 is 7969792669951.

Together with previous prime (1599662979679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 921121982001 + 678540997696 = 959751^2 + 823736^2 .

It is a cyclic number.

It is not a de Polignac number, because 1599662979697 - 2³⁵ = 1565303241329 is a prime.

It is a super-2 number, since 2×1599662979697² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1599662979647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 799831489848 + 799831489849.

It is an arithmetic number, because the mean of its divisors is an integer number (799831489849).

Almost surely, 2^{1599662979697} is an apocalyptic number.

It is an amenable number.

1599662979697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1599662979697 is an equidigital number, since it uses as much as digits as its factorization.

1599662979697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6249746160, while the sum is 85.

The spelling of 1599662979697 in words is "one trillion, five hundred ninety-nine billion, six hundred sixty-two million, nine hundred seventy-nine thousand, six hundred ninety-seven".