78840500547 has 4 divisors (see below), whose sum is σ = 105120667400. Its totient is φ = 52560333696.

The previous prime is 78840500509. The next prime is 78840500621. The reversal of 78840500547 is 74500504887.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 78840500547 - 2¹⁰ = 78840499523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78840500496 and 78840500505.

It is not an unprimeable number, because it can be changed into a prime (78840500507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13140083422 + ... + 13140083427.

It is an arithmetic number, because the mean of its divisors is an integer number (26280166850).

Almost surely, 2^78840500547 is an apocalyptic number.

78840500547 is a deficient number, since it is larger than the sum of its proper divisors (26280166853).

78840500547 is a wasteful number, since it uses less digits than its factorization.

78840500547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26280166852.

The product of its (nonzero) digits is 1254400, while the sum is 48.

The spelling of 78840500547 in words is "seventy-eight billion, eight hundred forty million, five hundred thousand, five hundred forty-seven".