6499379236897 has 2 divisors, whose sum is σ = 6499379236898. Its totient is φ = 6499379236896.

The previous prime is 6499379236859. The next prime is 6499379236939. The reversal of 6499379236897 is 7986329739946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5183198968896 + 1316180268001 = 2276664^2 + 1147249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6499379236897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6499379236897.

It is not a weakly prime, because it can be changed into another prime (6499379236997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3249689618448 + 3249689618449.

It is an arithmetic number, because the mean of its divisors is an integer number (3249689618449).

Almost surely, 2^{6499379236897} is an apocalyptic number.

It is an amenable number.

6499379236897 is a deficient number, since it is larger than the sum of its proper divisors (1).

6499379236897 is an equidigital number, since it uses as much as digits as its factorization.

6499379236897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6666395904, while the sum is 82.

The spelling of 6499379236897 in words is "six trillion, four hundred ninety-nine billion, three hundred seventy-nine million, two hundred thirty-six thousand, eight hundred ninety-seven".