6399590377 has 2 divisors, whose sum is σ = 6399590378. Its totient is φ = 6399590376.

The previous prime is 6399590339. The next prime is 6399590471. The reversal of 6399590377 is 7730959936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4627264576 + 1772325801 = 68024^2 + 42099^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6399590377 is a prime.

It is not a weakly prime, because it can be changed into another prime (6399593377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3199795188 + 3199795189.

It is an arithmetic number, because the mean of its divisors is an integer number (3199795189).

Almost surely, 2^6399590377 is an apocalyptic number.

It is an amenable number.

6399590377 is a deficient number, since it is larger than the sum of its proper divisors (1).

6399590377 is an equidigital number, since it uses as much as digits as its factorization.

6399590377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9644670, while the sum is 58.

The square root of 6399590377 is about 79997.4398152841. The cubic root of 6399590377 is about 1856.5959221512.

The spelling of 6399590377 in words is "six billion, three hundred ninety-nine million, five hundred ninety thousand, three hundred seventy-seven".