78647182540 has 12 divisors (see below), whose sum is σ = 165159083376. Its totient is φ = 31458873008.

The previous prime is 78647182517. The next prime is 78647182553. The reversal of 78647182540 is 4528174687.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1966179544 + ... + 1966179583.

It is an arithmetic number, because the mean of its divisors is an integer number (13763256948).

Almost surely, 2^78647182540 is an apocalyptic number.

It is an amenable number.

78647182540 is an abundant number, since it is smaller than the sum of its proper divisors (86511900836).

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

78647182540 is a wasteful number, since it uses less digits than its factorization.

78647182540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3932359136 (or 3932359134 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 52.

The spelling of 78647182540 in words is "seventy-eight billion, six hundred forty-seven million, one hundred eighty-two thousand, five hundred forty".