77840128082 has 8 divisors (see below), whose sum is σ = 116936835852. Its totient is φ = 38861182800.

The previous prime is 77840128061. The next prime is 77840128123. The reversal of 77840128082 is 28082104877.

It can be written as a sum of positive squares in 2 ways, for example, as 76390879321 + 1449248761 = 276389^2 + 38069^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29438969 + ... + 29441612.

Almost surely, 2^77840128082 is an apocalyptic number.

77840128082 is a deficient number, since it is larger than the sum of its proper divisors (39096707770).

77840128082 is a wasteful number, since it uses less digits than its factorization.

77840128082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58881244.

The product of its (nonzero) digits is 401408, while the sum is 47.

The spelling of 77840128082 in words is "seventy-seven billion, eight hundred forty million, one hundred twenty-eight thousand, eighty-two".