6863597681 has 4 divisors (see below), whose sum is σ = 6883264500. Its totient is φ = 6843930864.

The previous prime is 6863597669. The next prime is 6863597701. The reversal of 6863597681 is 1867953686.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5718384400 + 1145213281 = 75620^2 + 33841^2 .

It is a cyclic number.

It is not a de Polignac number, because 6863597681 - 2¹⁴ = 6863581297 is a prime.

It is a super-2 number, since 2×6863597681² = 94217946253257155522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6863597681.

It is not an unprimeable number, because it can be changed into a prime (6863591681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9832886 + ... + 9833583.

It is an arithmetic number, because the mean of its divisors is an integer number (1720816125).

Almost surely, 2^6863597681 is an apocalyptic number.

It is an amenable number.

6863597681 is a deficient number, since it is larger than the sum of its proper divisors (19666819).

6863597681 is a wasteful number, since it uses less digits than its factorization.

6863597681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19666818.

The product of its digits is 13063680, while the sum is 59.

The square root of 6863597681 is about 82846.8326552078. The cubic root of 6863597681 is about 1900.4244371271.

The spelling of 6863597681 in words is "six billion, eight hundred sixty-three million, five hundred ninety-seven thousand, six hundred eighty-one".