6402708681 has 8 divisors (see below), whose sum is σ = 8556217440. Its totient is φ = 4258836192.

The previous prime is 6402708677. The next prime is 6402708713. The reversal of 6402708681 is 1868072046.

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

It is not a de Polignac number, because 6402708681 - 2² = 6402708677 is a prime.

It is a super-2 number, since 2×6402708681² = 81989356907505519522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6402708671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2407516 + ... + 2410173.

It is an arithmetic number, because the mean of its divisors is an integer number (1069527180).

Almost surely, 2^6402708681 is an apocalyptic number.

It is an amenable number.

6402708681 is a deficient number, since it is larger than the sum of its proper divisors (2153508759).

6402708681 is a wasteful number, since it uses less digits than its factorization.

6402708681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4818135.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 6402708681 is about 80016.9274653807. The cubic root of 6402708681 is about 1856.8974253242.

The spelling of 6402708681 in words is "six billion, four hundred two million, seven hundred eight thousand, six hundred eighty-one".