6731513681 has 8 divisors (see below), whose sum is σ = 7128860544. Its totient is φ = 6334319680.

The previous prime is 6731513653. The next prime is 6731513687. The reversal of 6731513681 is 1863151376.

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

It is not a de Polignac number, because 6731513681 - 2¹⁸ = 6731251537 is a prime.

It is a super-2 number, since 2×6731513681² = 90626552874980339522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6731513687) 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, 59636 + ... + 130458.

It is an arithmetic number, because the mean of its divisors is an integer number (891107568).

Almost surely, 2^6731513681 is an apocalyptic number.

It is an amenable number.

6731513681 is a deficient number, since it is larger than the sum of its proper divisors (397346863).

6731513681 is a wasteful number, since it uses less digits than its factorization.

6731513681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76431.

The product of its digits is 90720, while the sum is 41.

The square root of 6731513681 is about 82045.8023362561. The cubic root of 6731513681 is about 1888.1547157614.

The spelling of 6731513681 in words is "six billion, seven hundred thirty-one million, five hundred thirteen thousand, six hundred eighty-one".