6547064681 has 4 divisors (see below), whose sum is σ = 6547498752. Its totient is φ = 6546630612.

The previous prime is 6547064677. The next prime is 6547064687. The reversal of 6547064681 is 1864607456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6547064681 - 2² = 6547064677 is a prime.

It is a super-2 number, since 2×6547064681² = 85728111874395263522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6547064687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193565 + ... + 224858.

It is an arithmetic number, because the mean of its divisors is an integer number (1636874688).

Almost surely, 2^6547064681 is an apocalyptic number.

It is an amenable number.

6547064681 is a deficient number, since it is larger than the sum of its proper divisors (434071).

6547064681 is a wasteful number, since it uses less digits than its factorization.

6547064681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434070.

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 6547064681 is about 80913.9337876981. The cubic root of 6547064681 is about 1870.7490951571.

The spelling of 6547064681 in words is "six billion, five hundred forty-seven million, sixty-four thousand, six hundred eighty-one".