6459680691 has 32 divisors (see below), whose sum is σ = 9647859200. Its totient is φ = 4271473440.

The previous prime is 6459680653. The next prime is 6459680699. The reversal of 6459680691 is 1960869546.

It is a happy number.

It is not a de Polignac number, because 6459680691 - 2⁶ = 6459680627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6459680699) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3436890 + ... + 3438768.

It is an arithmetic number, because the mean of its divisors is an integer number (301495600).

Almost surely, 2^6459680691 is an apocalyptic number.

6459680691 is a deficient number, since it is larger than the sum of its proper divisors (3188178509).

6459680691 is a wasteful number, since it uses less digits than its factorization.

6459680691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2856 (or 2850 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The square root of 6459680691 is about 80372.1387733336. The cubic root of 6459680691 is about 1862.3887960030.

The spelling of 6459680691 in words is "six billion, four hundred fifty-nine million, six hundred eighty thousand, six hundred ninety-one".