6981764497 has 8 divisors (see below), whose sum is σ = 7009763112. Its totient is φ = 6953788800.

The previous prime is 6981764483. The next prime is 6981764521. The reversal of 6981764497 is 7944671896.

It can be written as a sum of positive squares in 4 ways, for example, as 4964047936 + 2017716561 = 70456^2 + 44919^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6981764497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6981764437) 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, 856083 + ... + 864199.

It is an arithmetic number, because the mean of its divisors is an integer number (876220389).

Almost surely, 2^6981764497 is an apocalyptic number.

It is an amenable number.

6981764497 is a deficient number, since it is larger than the sum of its proper divisors (27998615).

6981764497 is a wasteful number, since it uses less digits than its factorization.

6981764497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11459.

The product of its digits is 18289152, while the sum is 61.

The square root of 6981764497 is about 83556.9536124912. The cubic root of 6981764497 is about 1911.2686305165.

The spelling of 6981764497 in words is "six billion, nine hundred eighty-one million, seven hundred sixty-four thousand, four hundred ninety-seven".