78842064373 has 4 divisors (see below), whose sum is σ = 78871518700. Its totient is φ = 78812610048.

The previous prime is 78842064359. The next prime is 78842064391. The reversal of 78842064373 is 37346024887.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1013339889 + 77828724484 = 31833^2 + 278978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78842064373 is a prime.

It is a super-2 number, since 2×78842064373² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78842064373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78842064173) 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, 14723148 + ... + 14728501.

It is an arithmetic number, because the mean of its divisors is an integer number (19717879675).

Almost surely, 2^78842064373 is an apocalyptic number.

It is an amenable number.

78842064373 is a deficient number, since it is larger than the sum of its proper divisors (29454327).

78842064373 is a wasteful number, since it uses less digits than its factorization.

78842064373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29454326.

The product of its (nonzero) digits is 5419008, while the sum is 52.

The spelling of 78842064373 in words is "seventy-eight billion, eight hundred forty-two million, sixty-four thousand, three hundred seventy-three".