78578936429 has 8 divisors (see below), whose sum is σ = 89856094848. Its totient is φ = 67314677040.

The previous prime is 78578936407. The next prime is 78578936473. The reversal of 78578936429 is 92463987587.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78578936429 - 2²⁰ = 78577887853 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 (78578936129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3211697 + ... + 3236070.

It is an arithmetic number, because the mean of its divisors is an integer number (11232011856).

Almost surely, 2^78578936429 is an apocalyptic number.

It is an amenable number.

78578936429 is a deficient number, since it is larger than the sum of its proper divisors (11277158419).

78578936429 is a wasteful number, since it uses less digits than its factorization.

78578936429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6449515.

The product of its digits is 182891520, while the sum is 68.

The spelling of 78578936429 in words is "seventy-eight billion, five hundred seventy-eight million, nine hundred thirty-six thousand, four hundred twenty-nine".