863872680773 has 4 divisors (see below), whose sum is σ = 863874819948. Its totient is φ = 863870541600.

The previous prime is 863872680761. The next prime is 863872680793. The reversal of 863872680773 is 377086278368.

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 766917044644 + 96955636129 = 875738^2 + 311377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-863872680773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863872680793) 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, 259136 + ... + 1339737.

It is an arithmetic number, because the mean of its divisors is an integer number (215968704987).

Almost surely, 2^863872680773 is an apocalyptic number.

It is an amenable number.

863872680773 is a deficient number, since it is larger than the sum of its proper divisors (2139175).

863872680773 is a wasteful number, since it uses less digits than its factorization.

863872680773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139174.

The product of its (nonzero) digits is 113799168, while the sum is 65.

The spelling of 863872680773 in words is "eight hundred sixty-three billion, eight hundred seventy-two million, six hundred eighty thousand, seven hundred seventy-three".