77958988479 has 12 divisors (see below), whose sum is σ = 112610966832. Its totient is φ = 51971025600.

The previous prime is 77958988453. The next prime is 77958988517. The reversal of 77958988479 is 97488985977.

It is a happy number.

77958988479 is a `hidden beast` number, since 7 + 7 + 9 + 58 + 98 + 8 + 479 = 666.

It is not a de Polignac number, because 77958988479 - 2⁵ = 77958988447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77958988398 and 77958988407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77958988279) 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, 213399 + ... + 448839.

It is an arithmetic number, because the mean of its divisors is an integer number (9384247236).

Almost surely, 2^77958988479 is an apocalyptic number.

77958988479 is a deficient number, since it is larger than the sum of its proper divisors (34651978353).

77958988479 is a wasteful number, since it uses less digits than its factorization.

77958988479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272238 (or 272235 counting only the distinct ones).

The product of its digits is 2560481280, while the sum is 81.

The spelling of 77958988479 in words is "seventy-seven billion, nine hundred fifty-eight million, nine hundred eighty-eight thousand, four hundred seventy-nine".