78829292887 has 4 divisors (see below), whose sum is σ = 79086066136. Its totient is φ = 78572519640.

The previous prime is 78829292881. The next prime is 78829292939.

78829292887 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 78829292887 - 2³ = 78829292879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78829292881) 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, 128386164 + ... + 128386777.

It is an arithmetic number, because the mean of its divisors is an integer number (19771516534).

Almost surely, 2^78829292887 is an apocalyptic number.

78829292887 is a deficient number, since it is larger than the sum of its proper divisors (256773249).

78829292887 is a wasteful number, since it uses less digits than its factorization.

78829292887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256773248.

The product of its digits is 130056192, while the sum is 70.

The spelling of 78829292887 in words is "seventy-eight billion, eight hundred twenty-nine million, two hundred ninety-two thousand, eight hundred eighty-seven".