78433440218699 has 4 divisors (see below), whose sum is σ = 78436726238640. Its totient is φ = 78430154198760.

The previous prime is 78433440218689. The next prime is 78433440218701. The reversal of 78433440218699 is 99681204433487.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78433440218699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78433440218669) 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, 1642974167 + ... + 1643021904.

It is an arithmetic number, because the mean of its divisors is an integer number (19609181559660).

Almost surely, 2^{78433440218699} is an apocalyptic number.

78433440218699 is a deficient number, since it is larger than the sum of its proper divisors (3286019941).

78433440218699 is a wasteful number, since it uses less digits than its factorization.

78433440218699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286019940.

The product of its (nonzero) digits is 250822656, while the sum is 68.

The spelling of 78433440218699 in words is "seventy-eight trillion, four hundred thirty-three billion, four hundred forty million, two hundred eighteen thousand, six hundred ninety-nine".