78963401920 has 112 divisors (see below), whose sum is σ = 204354501120. Its totient is φ = 28888068096.

The previous prime is 78963401897. The next prime is 78963401929. The reversal of 78963401920 is 2910436987.

It is not an unprimeable number, because it can be changed into a prime (78963401929) 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, 366369 + ... + 540511.

It is an arithmetic number, because the mean of its divisors is an integer number (1824593760).

Almost surely, 2^78963401920 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 78963401920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102177250560).

78963401920 is an abundant number, since it is smaller than the sum of its proper divisors (125391099200).

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

78963401920 is a wasteful number, since it uses less digits than its factorization.

78963401920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174282 (or 174272 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 78963401920 in words is "seventy-eight billion, nine hundred sixty-three million, four hundred one thousand, nine hundred twenty".