78807829513 has 16 divisors (see below), whose sum is σ = 90590071936. Its totient is φ = 67156801920.

The previous prime is 78807829511. The next prime is 78807829517. The reversal of 78807829513 is 31592870887.

It is a cyclic number.

It is not a de Polignac number, because 78807829513 - 2¹ = 78807829511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78807829511) 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, 5825245 + ... + 5838757.

It is an arithmetic number, because the mean of its divisors is an integer number (5661879496).

Almost surely, 2^78807829513 is an apocalyptic number.

It is an amenable number.

78807829513 is a deficient number, since it is larger than the sum of its proper divisors (11782242423).

78807829513 is a wasteful number, since it uses less digits than its factorization.

78807829513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18304.

The product of its (nonzero) digits is 6773760, while the sum is 58.

The spelling of 78807829513 in words is "seventy-eight billion, eight hundred seven million, eight hundred twenty-nine thousand, five hundred thirteen".