78910571772 has 288 divisors, whose sum is σ = 223187065920. Its totient is φ = 23410114560.

The previous prime is 78910571743. The next prime is 78910571777. The reversal of 78910571772 is 27717501987.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78910571777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 117251628 + ... + 117252300.

It is an arithmetic number, because the mean of its divisors is an integer number (774955090).

Almost surely, 2^78910571772 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 78910571772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111593532960).

78910571772 is an abundant number, since it is smaller than the sum of its proper divisors (144276494148).

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

78910571772 is a wasteful number, since it uses less digits than its factorization.

78910571772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 1728720, while the sum is 54.

The spelling of 78910571772 in words is "seventy-eight billion, nine hundred ten million, five hundred seventy-one thousand, seven hundred seventy-two".