1597067212649 has 2 divisors, whose sum is σ = 1597067212650. Its totient is φ = 1597067212648.

The previous prime is 1597067212639. The next prime is 1597067212661. The reversal of 1597067212649 is 9462127607951.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1520597265625 + 76469947024 = 1233125^2 + 276532^2 .

It is a cyclic number.

It is not a de Polignac number, because 1597067212649 - 2⁴ = 1597067212633 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 (1597067212619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 798533606324 + 798533606325.

It is an arithmetic number, because the mean of its divisors is an integer number (798533606325).

Almost surely, 2^{1597067212649} is an apocalyptic number.

It is an amenable number.

1597067212649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1597067212649 is an equidigital number, since it uses as much as digits as its factorization.

1597067212649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11430720, while the sum is 59.

The spelling of 1597067212649 in words is "one trillion, five hundred ninety-seven billion, sixty-seven million, two hundred twelve thousand, six hundred forty-nine".