6456642466531 has 2 divisors, whose sum is σ = 6456642466532. Its totient is φ = 6456642466530.

The previous prime is 6456642466513. The next prime is 6456642466559. The reversal of 6456642466531 is 1356642466546.

Together with previous prime (6456642466513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6456642466531 - 2³⁵ = 6422282728163 is a prime.

It is a super-2 number, since 2×6456642466531² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6456642466331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3228321233265 + 3228321233266.

It is an arithmetic number, because the mean of its divisors is an integer number (3228321233266).

Almost surely, 2^{6456642466531} is an apocalyptic number.

6456642466531 is a deficient number, since it is larger than the sum of its proper divisors (1).

6456642466531 is an equidigital number, since it uses as much as digits as its factorization.

6456642466531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74649600, while the sum is 58.

The spelling of 6456642466531 in words is "six trillion, four hundred fifty-six billion, six hundred forty-two million, four hundred sixty-six thousand, five hundred thirty-one".