78810017712 has 20 divisors (see below), whose sum is σ = 203592545880. Its totient is φ = 26270005888.

The previous prime is 78810017701. The next prime is 78810017731. The reversal of 78810017712 is 21771001887.

It is a super-2 number, since 2×78810017712² (a number of 23 digits) contains 22 as substring.

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, 820937637 + ... + 820937732.

It is an arithmetic number, because the mean of its divisors is an integer number (10179627294).

Almost surely, 2^78810017712 is an apocalyptic number.

It is an amenable number.

78810017712 is an abundant number, since it is smaller than the sum of its proper divisors (124782528168).

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

78810017712 is a wasteful number, since it uses less digits than its factorization.

78810017712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641875380 (or 1641875374 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 42.

The spelling of 78810017712 in words is "seventy-eight billion, eight hundred ten million, seventeen thousand, seven hundred twelve".