78471999936 has 112 divisors (see below), whose sum is σ = 251665313280. Its totient is φ = 23779388160.

The previous prime is 78471999929. The next prime is 78471999937. The reversal of 78471999936 is 63999917487.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78471999937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2045176 + ... + 2083191.

Almost surely, 2^78471999936 is an apocalyptic number.

It is an amenable number.

78471999936 is an abundant number, since it is smaller than the sum of its proper divisors (173193313344).

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

78471999936 is a wasteful number, since it uses less digits than its factorization.

78471999936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4128399 (or 4128383 counting only the distinct ones).

The product of its digits is 185177664, while the sum is 72.

The spelling of 78471999936 in words is "seventy-eight billion, four hundred seventy-one million, nine hundred ninety-nine thousand, nine hundred thirty-six".