6406336591 has 2 divisors, whose sum is σ = 6406336592. Its totient is φ = 6406336590.

The previous prime is 6406336529. The next prime is 6406336619. The reversal of 6406336591 is 1956336046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6406336591 - 2⁷ = 6406336463 is a prime.

It is a super-2 number, since 2×6406336591² = 82082297034371002562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6406336891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3203168295 + 3203168296.

It is an arithmetic number, because the mean of its divisors is an integer number (3203168296).

Almost surely, 2^6406336591 is an apocalyptic number.

6406336591 is a deficient number, since it is larger than the sum of its proper divisors (1).

6406336591 is an equidigital number, since it uses as much as digits as its factorization.

6406336591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 43.

The square root of 6406336591 is about 80039.5938957714. The cubic root of 6406336591 is about 1857.2480782065.

The spelling of 6406336591 in words is "six billion, four hundred six million, three hundred thirty-six thousand, five hundred ninety-one".