78433440218701 has 2 divisors, whose sum is σ = 78433440218702. Its totient is φ = 78433440218700.

The previous prime is 78433440218689. The next prime is 78433440218719. The reversal of 78433440218701 is 10781204433487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64325228130601 + 14108212088100 = 8020301^2 + 3756090^2 .

It is a cyclic number.

It is not a de Polignac number, because 78433440218701 - 2⁵ = 78433440218669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78433440218761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39216720109350 + 39216720109351.

It is an arithmetic number, because the mean of its divisors is an integer number (39216720109351).

Almost surely, 2^{78433440218701} is an apocalyptic number.

It is an amenable number.

78433440218701 is a deficient number, since it is larger than the sum of its proper divisors (1).

78433440218701 is an equidigital number, since it uses as much as digits as its factorization.

78433440218701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3612672, while the sum is 52.

The spelling of 78433440218701 in words is "seventy-eight trillion, four hundred thirty-three billion, four hundred forty million, two hundred eighteen thousand, seven hundred one".