6402311557 has 2 divisors, whose sum is σ = 6402311558. Its totient is φ = 6402311556.

The previous prime is 6402311519. The next prime is 6402311567. The reversal of 6402311557 is 7551132046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5829475201 + 572836356 = 76351^2 + 23934^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6402311557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6402311567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3201155778 + 3201155779.

It is an arithmetic number, because the mean of its divisors is an integer number (3201155779).

Almost surely, 2^6402311557 is an apocalyptic number.

It is an amenable number.

6402311557 is a deficient number, since it is larger than the sum of its proper divisors (1).

6402311557 is an equidigital number, since it uses as much as digits as its factorization.

6402311557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 6402311557 is about 80014.4459269700. The cubic root of 6402311557 is about 1856.8590335634.

The spelling of 6402311557 in words is "six billion, four hundred two million, three hundred eleven thousand, five hundred fifty-seven".