646064040097 has 32 divisors (see below), whose sum is σ = 777445392384. Its totient is φ = 525193156800.

The previous prime is 646064040077. The next prime is 646064040107. The reversal of 646064040097 is 790040460646.

It is a cyclic number.

It is not a de Polignac number, because 646064040097 - 2³⁵ = 611704301729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646064040007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10169722 + ... + 10233052.

It is an arithmetic number, because the mean of its divisors is an integer number (24295168512).

Almost surely, 2^646064040097 is an apocalyptic number.

It is an amenable number.

646064040097 is a deficient number, since it is larger than the sum of its proper divisors (131381352287).

646064040097 is a wasteful number, since it uses less digits than its factorization.

646064040097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64309.

The product of its (nonzero) digits is 870912, while the sum is 46.

The spelling of 646064040097 in words is "six hundred forty-six billion, sixty-four million, forty thousand, ninety-seven".