78802042829 has 4 divisors (see below), whose sum is σ = 78989221500. Its totient is φ = 78614864160.

The previous prime is 78802042819. The next prime is 78802042901. The reversal of 78802042829 is 92824020887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92824020887 = 13 ⋅7140309299.

It can be written as a sum of positive squares in 2 ways, for example, as 5580388804 + 73221654025 = 74702^2 + 270595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78802042829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78802042819) 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, 93588704 + ... + 93589545.

It is an arithmetic number, because the mean of its divisors is an integer number (19747305375).

Almost surely, 2^78802042829 is an apocalyptic number.

It is an amenable number.

78802042829 is a deficient number, since it is larger than the sum of its proper divisors (187178671).

78802042829 is a wasteful number, since it uses less digits than its factorization.

78802042829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187178670.

The product of its (nonzero) digits is 1032192, while the sum is 50.

The spelling of 78802042829 in words is "seventy-eight billion, eight hundred two million, forty-two thousand, eight hundred twenty-nine".