78631724236 has 12 divisors (see below), whose sum is σ = 148190557312. Its totient is φ = 36291565008.

The previous prime is 78631724221. The next prime is 78631724273. The reversal of 78631724236 is 63242713687.

It is a self number, because there is not a number n which added to its sum of digits gives 78631724236.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756074220 + ... + 756074323.

Almost surely, 2^78631724236 is an apocalyptic number.

It is an amenable number.

78631724236 is a deficient number, since it is larger than the sum of its proper divisors (69558833076).

78631724236 is a wasteful number, since it uses less digits than its factorization.

78631724236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512148560 (or 1512148558 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 49.

The spelling of 78631724236 in words is "seventy-eight billion, six hundred thirty-one million, seven hundred twenty-four thousand, two hundred thirty-six".