78523043736 has 16 divisors (see below), whose sum is σ = 196307609400. Its totient is φ = 26174347904.

The previous prime is 78523043723. The next prime is 78523043743. The reversal of 78523043736 is 63734032587.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1635896721 + ... + 1635896768.

Almost surely, 2^78523043736 is an apocalyptic number.

It is an amenable number.

78523043736 is an abundant number, since it is smaller than the sum of its proper divisors (117784565664).

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

78523043736 is a wasteful number, since it uses less digits than its factorization.

78523043736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3271793498 (or 3271793494 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 48.

The spelling of 78523043736 in words is "seventy-eight billion, five hundred twenty-three million, forty-three thousand, seven hundred thirty-six".