78650786432 has 64 divisors (see below), whose sum is σ = 158336640000. Its totient is φ = 38912375808.

The previous prime is 78650786419. The next prime is 78650786441. The reversal of 78650786432 is 23468705687.

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 11702369 + ... + 11709087.

It is an arithmetic number, because the mean of its divisors is an integer number (2474010000).

Almost surely, 2^78650786432 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 78650786432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79168320000).

78650786432 is an abundant number, since it is smaller than the sum of its proper divisors (79685853568).

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

78650786432 is a wasteful number, since it uses less digits than its factorization.

78650786432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7681 (or 7669 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 56.

The spelling of 78650786432 in words is "seventy-eight billion, six hundred fifty million, seven hundred eighty-six thousand, four hundred thirty-two".