78249320000 has 140 divisors (see below), whose sum is σ = 198769557756. Its totient is φ = 30535680000.

The previous prime is 78249319979. The next prime is 78249320053. The reversal of 78249320000 is 2394287.

It can be written as a sum of positive squares in 10 ways, for example, as 78234327616 + 14992384 = 279704^2 + 3872^2 .

It is a super-2 number, since 2×78249320000² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1616144 + ... + 1663856.

Almost surely, 2^78249320000 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 78249320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99384778878).

78249320000 is an abundant number, since it is smaller than the sum of its proper divisors (120520237756).

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

78249320000 is an equidigital number, since it uses as much as digits as its factorization.

78249320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47786 (or 47761 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 78249320000 in words is "seventy-eight billion, two hundred forty-nine million, three hundred twenty thousand".