78276994872 has 256 divisors, whose sum is σ = 210334924800. Its totient is φ = 24242250240.

The previous prime is 78276994871. The next prime is 78276994879. The reversal of 78276994872 is 27849967287.

It is a super-2 number, since 2×78276994872² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78276994797 and 78276994806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78276994871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 563143779 + ... + 563143917.

It is an arithmetic number, because the mean of its divisors is an integer number (821620800).

Almost surely, 2^78276994872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78276994872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105167462400).

78276994872 is an abundant number, since it is smaller than the sum of its proper divisors (132057929928).

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

78276994872 is a wasteful number, since it uses less digits than its factorization.

78276994872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466 (or 462 counting only the distinct ones).

The product of its digits is 170698752, while the sum is 69.

The spelling of 78276994872 in words is "seventy-eight billion, two hundred seventy-six million, nine hundred ninety-four thousand, eight hundred seventy-two".