78840500506 has 8 divisors (see below), whose sum is σ = 121456987380. Its totient is φ = 38354838048.

The previous prime is 78840500467. The next prime is 78840500507. The reversal of 78840500506 is 60500504887.

It can be written as a sum of positive squares in 2 ways, for example, as 78087272481 + 753228025 = 279441^2 + 27445^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 532706011 + ... + 532706158.

Almost surely, 2^78840500506 is an apocalyptic number.

78840500506 is a deficient number, since it is larger than the sum of its proper divisors (42616486874).

78840500506 is a wasteful number, since it uses less digits than its factorization.

78840500506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065412208.

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 78840500506 in words is "seventy-eight billion, eight hundred forty million, five hundred thousand, five hundred six".