78688487593 has 16 divisors (see below), whose sum is σ = 86508794880. Its totient is φ = 71241874704.

The previous prime is 78688487539. The next prime is 78688487611. The reversal of 78688487593 is 39578488687.

It is a cyclic number.

It is not a de Polignac number, because 78688487593 - 2⁹ = 78688487081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78688485593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 410580 + ... + 570922.

It is an arithmetic number, because the mean of its divisors is an integer number (5406799680).

Almost surely, 2^78688487593 is an apocalyptic number.

It is an amenable number.

78688487593 is a deficient number, since it is larger than the sum of its proper divisors (7820307287).

78688487593 is a wasteful number, since it uses less digits than its factorization.

78688487593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161508.

The product of its digits is 650280960, while the sum is 73.

The spelling of 78688487593 in words is "seventy-eight billion, six hundred eighty-eight million, four hundred eighty-seven thousand, five hundred ninety-three".