77284808639 has 8 divisors (see below), whose sum is σ = 77693996880. Its totient is φ = 76875710976.

The previous prime is 77284808611. The next prime is 77284808707. The reversal of 77284808639 is 93680848277.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77284808639 - 2²⁸ = 77016373183 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 (77284808239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2329832 + ... + 2362770.

It is an arithmetic number, because the mean of its divisors is an integer number (9711749610).

Almost surely, 2^77284808639 is an apocalyptic number.

77284808639 is a deficient number, since it is larger than the sum of its proper divisors (409188241).

77284808639 is a wasteful number, since it uses less digits than its factorization.

77284808639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45289.

The product of its (nonzero) digits is 32514048, while the sum is 62.

The spelling of 77284808639 in words is "seventy-seven billion, two hundred eighty-four million, eight hundred eight thousand, six hundred thirty-nine".