76645454839 has 4 divisors (see below), whose sum is σ = 81154011024. Its totient is φ = 72136898656.

The previous prime is 76645454827. The next prime is 76645454843. The reversal of 76645454839 is 93845454667.

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-76645454839 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 (76645454239) 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, 2254278067 + ... + 2254278100.

It is an arithmetic number, because the mean of its divisors is an integer number (20288502756).

Almost surely, 2^76645454839 is an apocalyptic number.

76645454839 is a deficient number, since it is larger than the sum of its proper divisors (4508556185).

76645454839 is a wasteful number, since it uses less digits than its factorization.

76645454839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508556184.

The product of its digits is 87091200, while the sum is 61.

The spelling of 76645454839 in words is "seventy-six billion, six hundred forty-five million, four hundred fifty-four thousand, eight hundred thirty-nine".