78516532992 has 108 divisors (see below), whose sum is σ = 218450222984. Its totient is φ = 25034127360.

The previous prime is 78516532933. The next prime is 78516532993. The reversal of 78516532992 is 29923561587.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78516532993) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 309642 + ... + 502902.

Almost surely, 2^78516532992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78516532992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109225111492).

78516532992 is an abundant number, since it is smaller than the sum of its proper divisors (139933689992).

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

78516532992 is a wasteful number, since it uses less digits than its factorization.

78516532992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193326 (or 193289 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 57.

The spelling of 78516532992 in words is "seventy-eight billion, five hundred sixteen million, five hundred thirty-two thousand, nine hundred ninety-two".