78905809710 has 192 divisors, whose sum is σ = 261206225280. Its totient is φ = 16074132480.

The previous prime is 78905809679. The next prime is 78905809727. The reversal of 78905809710 is 1790850987.

It is a super-2 number, since 2×78905809710² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 71400 + ... + 403620.

It is an arithmetic number, because the mean of its divisors is an integer number (1360449090).

Almost surely, 2^78905809710 is an apocalyptic number.

78905809710 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78905809710, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130603112640).

78905809710 is an abundant number, since it is smaller than the sum of its proper divisors (182300415570).

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

78905809710 is a wasteful number, since it uses less digits than its factorization.

78905809710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332283 (or 332280 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 54.

The spelling of 78905809710 in words is "seventy-eight billion, nine hundred five million, eight hundred nine thousand, seven hundred ten".