77912839418 has 8 divisors (see below), whose sum is σ = 118182397140. Its totient is φ = 38518707040.

The previous prime is 77912839379. The next prime is 77912839423. The reversal of 77912839418 is 81493821977.

It can be written as a sum of positive squares in 2 ways, for example, as 60288418369 + 17624421049 = 245537^2 + 132757^2 .

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, 218856113 + ... + 218856468.

Almost surely, 2^77912839418 is an apocalyptic number.

77912839418 is a deficient number, since it is larger than the sum of its proper divisors (40269557722).

77912839418 is a wasteful number, since it uses less digits than its factorization.

77912839418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437712672.

The product of its digits is 6096384, while the sum is 59.

The spelling of 77912839418 in words is "seventy-seven billion, nine hundred twelve million, eight hundred thirty-nine thousand, four hundred eighteen".