78820028259 has 16 divisors (see below), whose sum is σ = 122899890432. Its totient is φ = 43992573408.

The previous prime is 78820028237. The next prime is 78820028263. The reversal of 78820028259 is 95282002887.

It is not a de Polignac number, because 78820028259 - 2¹² = 78820024163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78820028299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43642524 + ... + 43644329.

It is an arithmetic number, because the mean of its divisors is an integer number (7681243152).

Almost surely, 2^78820028259 is an apocalyptic number.

78820028259 is a deficient number, since it is larger than the sum of its proper divisors (44079862173).

78820028259 is a wasteful number, since it uses less digits than its factorization.

78820028259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87286906.

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 78820028259 in words is "seventy-eight billion, eight hundred twenty million, twenty-eight thousand, two hundred fifty-nine".