78993514458 has 12 divisors (see below), whose sum is σ = 171152614698. Its totient is φ = 26331171480.

The previous prime is 78993514441. The next prime is 78993514463. The reversal of 78993514458 is 85441539987.

78993514458 is a `hidden beast` number, since 7 + 89 + 93 + 5 + 14 + 458 = 666.

It can be written as a sum of positive squares in only one way, i.e., 77742265329 + 1251249129 = 278823^2 + 35373^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78993514395 and 78993514404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2194264273 + ... + 2194264308.

Almost surely, 2^78993514458 is an apocalyptic number.

78993514458 is an abundant number, since it is smaller than the sum of its proper divisors (92159100240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78993514458 is a wasteful number, since it uses less digits than its factorization.

78993514458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4388528589 (or 4388528586 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 63.

The spelling of 78993514458 in words is "seventy-eight billion, nine hundred ninety-three million, five hundred fourteen thousand, four hundred fifty-eight".