6464326681 has 8 divisors (see below), whose sum is σ = 6613266240. Its totient is φ = 6316699728.

The previous prime is 6464326669. The next prime is 6464326691. The reversal of 6464326681 is 1866234646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6464326681 - 2¹³ = 6464318489 is a prime.

It is a super-2 number, since 2×6464326681² = 83575038877376951522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6464326651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318186 + ... + 337891.

It is an arithmetic number, because the mean of its divisors is an integer number (826658280).

Almost surely, 2^6464326681 is an apocalyptic number.

It is an amenable number.

6464326681 is a deficient number, since it is larger than the sum of its proper divisors (148939559).

6464326681 is a wasteful number, since it uses less digits than its factorization.

6464326681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656303.

The product of its digits is 995328, while the sum is 46.

The square root of 6464326681 is about 80401.0365667011. The cubic root of 6464326681 is about 1862.8351837093.

The spelling of 6464326681 in words is "six billion, four hundred sixty-four million, three hundred twenty-six thousand, six hundred eighty-one".