78744698558 has 16 divisors (see below), whose sum is σ = 123259289760. Its totient is φ = 37658455296.

The previous prime is 78744698533. The next prime is 78744698567. The reversal of 78744698558 is 85589644787.

It is a junction number, because it is equal to n+sod(n) for n = 78744698491 and 78744698500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1120358 + ... + 1188566.

It is an arithmetic number, because the mean of its divisors is an integer number (7703705610).

Almost surely, 2^78744698558 is an apocalyptic number.

78744698558 is a deficient number, since it is larger than the sum of its proper divisors (44514591202).

78744698558 is a wasteful number, since it uses less digits than its factorization.

78744698558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93331.

The product of its digits is 541900800, while the sum is 71.

The spelling of 78744698558 in words is "seventy-eight billion, seven hundred forty-four million, six hundred ninety-eight thousand, five hundred fifty-eight".