76786442789 has 12 divisors (see below), whose sum is σ = 89477843724. Its totient is φ = 65702859264.

The previous prime is 76786442743. The next prime is 76786442791. The reversal of 76786442789 is 98724468767.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 72701954689 + 4084488100 = 269633^2 + 63910^2 .

It is not a de Polignac number, because 76786442789 - 2⁸ = 76786442533 is a prime.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76786442389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1329674 + ... + 1386219.

It is an arithmetic number, because the mean of its divisors is an integer number (7456486977).

Almost surely, 2^76786442789 is an apocalyptic number.

It is an amenable number.

76786442789 is a deficient number, since it is larger than the sum of its proper divisors (12691400935).

76786442789 is a wasteful number, since it uses less digits than its factorization.

76786442789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2716484 (or 2716477 counting only the distinct ones).

The product of its digits is 227598336, while the sum is 68.

The spelling of 76786442789 in words is "seventy-six billion, seven hundred eighty-six million, four hundred forty-two thousand, seven hundred eighty-nine".