6731616861 has 48 divisors (see below), whose sum is σ = 10473136128. Its totient is φ = 4316166000.

The previous prime is 6731616833. The next prime is 6731616863. The reversal of 6731616861 is 1686161376.

It is not a de Polignac number, because 6731616861 - 2¹⁸ = 6731354717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6731616863) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1255336 + ... + 1260686.

It is an arithmetic number, because the mean of its divisors is an integer number (218190336).

Almost surely, 2^6731616861 is an apocalyptic number.

It is an amenable number.

6731616861 is a deficient number, since it is larger than the sum of its proper divisors (3741519267).

6731616861 is a wasteful number, since it uses less digits than its factorization.

6731616861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5564 (or 5552 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 6731616861 is about 82046.4311289650. The cubic root of 6731616861 is about 1888.1643628640.

The spelling of 6731616861 in words is "six billion, seven hundred thirty-one million, six hundred sixteen thousand, eight hundred sixty-one".