78531183068536 has 32 divisors (see below), whose sum is σ = 160635244204800. Its totient is φ = 35695263673440.

The previous prime is 78531183068483. The next prime is 78531183068537. The reversal of 78531183068536 is 63586038113587.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78531183068537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4760496 + ... + 13406143.

It is an arithmetic number, because the mean of its divisors is an integer number (5019851381400).

Almost surely, 2^{78531183068536} is an apocalyptic number.

It is an amenable number.

78531183068536 is an abundant number, since it is smaller than the sum of its proper divisors (82104061136264).

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

78531183068536 is a wasteful number, since it uses less digits than its factorization.

78531183068536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18215779 (or 18215775 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 64.

The spelling of 78531183068536 in words is "seventy-eight trillion, five hundred thirty-one billion, one hundred eighty-three million, sixty-eight thousand, five hundred thirty-six".