78834911730 has 64 divisors (see below), whose sum is σ = 194512002048. Its totient is φ = 20433980160.

The previous prime is 78834911717. The next prime is 78834911737. The reversal of 78834911730 is 3711943887.

It is not an unprimeable number, because it can be changed into a prime (78834911737) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1089375 + ... + 1159485.

It is an arithmetic number, because the mean of its divisors is an integer number (3039250032).

Almost surely, 2^78834911730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78834911730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97256001024).

78834911730 is an abundant number, since it is smaller than the sum of its proper divisors (115677090318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78834911730 is a wasteful number, since it uses less digits than its factorization.

78834911730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71171.

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 78834911730 in words is "seventy-eight billion, eight hundred thirty-four million, nine hundred eleven thousand, seven hundred thirty".