78682861331 has 4 divisors (see below), whose sum is σ = 79461899664. Its totient is φ = 77903823000.

The previous prime is 78682861307. The next prime is 78682861403. The reversal of 78682861331 is 13316828687.

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

It is a cyclic number.

It is not a de Polignac number, because 78682861331 - 2¹⁰ = 78682860307 is a prime.

It is a super-2 number, since 2×78682861331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78682860331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389519015 + ... + 389519216.

It is an arithmetic number, because the mean of its divisors is an integer number (19865474916).

Almost surely, 2^78682861331 is an apocalyptic number.

78682861331 is a deficient number, since it is larger than the sum of its proper divisors (779038333).

78682861331 is a wasteful number, since it uses less digits than its factorization.

78682861331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779038332.

The product of its digits is 2322432, while the sum is 53.

The spelling of 78682861331 in words is "seventy-eight billion, six hundred eighty-two million, eight hundred sixty-one thousand, three hundred thirty-one".