78353212854 has 64 divisors (see below), whose sum is σ = 185424422400. Its totient is φ = 21596510208.

The previous prime is 78353212831. The next prime is 78353212943. The reversal of 78353212854 is 45821235387.

It is a super-2 number, since 2×78353212854² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1455877 + ... + 1508735.

It is an arithmetic number, because the mean of its divisors is an integer number (2897256600).

Almost surely, 2^78353212854 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78353212854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92712211200).

78353212854 is an abundant number, since it is smaller than the sum of its proper divisors (107071209546).

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

78353212854 is a wasteful number, since it uses less digits than its factorization.

78353212854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54117.

The product of its digits is 1612800, while the sum is 48.

The spelling of 78353212854 in words is "seventy-eight billion, three hundred fifty-three million, two hundred twelve thousand, eight hundred fifty-four".