78082805831 has 4 divisors (see below), whose sum is σ = 78084017664. Its totient is φ = 78081594000.

The previous prime is 78082805803. The next prime is 78082805881. The reversal of 78082805831 is 13850828087.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78082805831 is a prime.

It is a super-2 number, since 2×78082805831² (a number of 23 digits) 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 78082805831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78082805881) 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, 503495 + ... + 640056.

It is an arithmetic number, because the mean of its divisors is an integer number (19521004416).

Almost surely, 2^78082805831 is an apocalyptic number.

78082805831 is a deficient number, since it is larger than the sum of its proper divisors (1211833).

78082805831 is a wasteful number, since it uses less digits than its factorization.

78082805831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211832.

The product of its (nonzero) digits is 860160, while the sum is 50.

The spelling of 78082805831 in words is "seventy-eight billion, eighty-two million, eight hundred five thousand, eight hundred thirty-one".