78193981480 has 96 divisors (see below), whose sum is σ = 183347456040. Its totient is φ = 29995335680.

The previous prime is 78193981417. The next prime is 78193981549. The reversal of 78193981480 is 8418939187.

It can be written as a sum of positive squares in 4 ways, for example, as 18703844644 + 59490136836 = 136762^2 + 243906^2 .

It is a super-2 number, since 2×78193981480² (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 23 ways as a sum of consecutive naturals, for example, 5701992 + ... + 5715688.

Almost surely, 2^78193981480 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 78193981480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91673728020).

78193981480 is an abundant number, since it is smaller than the sum of its proper divisors (105153474560).

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

78193981480 is a wasteful number, since it uses less digits than its factorization.

78193981480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13867 (or 13804 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 58.

The spelling of 78193981480 in words is "seventy-eight billion, one hundred ninety-three million, nine hundred eighty-one thousand, four hundred eighty".