78682874452 has 54 divisors (see below), whose sum is σ = 172528117902. Its totient is φ = 31121689536.

The previous prime is 78682874447. The next prime is 78682874507. The reversal of 78682874452 is 25447828687.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 35832218436 + 42850656016 = 189294^2 + 207004^2 .

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 14156458 + ... + 14162014.

Almost surely, 2^78682874452 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 78682874452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86264058951).

78682874452 is an abundant number, since it is smaller than the sum of its proper divisors (93845243450).

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

78682874452 is an equidigital number, since it uses as much as digits as its factorization.

78682874452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11145 (or 5579 counting only the distinct ones).

The product of its digits is 48168960, while the sum is 61.

The spelling of 78682874452 in words is "seventy-eight billion, six hundred eighty-two million, eight hundred seventy-four thousand, four hundred fifty-two".