78771581280 has 576 divisors, whose sum is σ = 328424398848. Its totient is φ = 16800030720.

The previous prime is 78771581237. The next prime is 78771581353. The reversal of 78771581280 is 8218517787.

It is a congruent number.

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 95 ways as a sum of consecutive naturals, for example, 9501297 + ... + 9509583.

It is an arithmetic number, because the mean of its divisors is an integer number (570181248).

Almost surely, 2^78771581280 is an apocalyptic number.

78771581280 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78771581280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164212199424).

78771581280 is an abundant number, since it is smaller than the sum of its proper divisors (249652817568).

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

78771581280 is a wasteful number, since it uses less digits than its factorization.

78771581280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8379 (or 8368 counting only the distinct ones).

The product of its (nonzero) digits is 1756160, while the sum is 54.

The spelling of 78771581280 in words is "seventy-eight billion, seven hundred seventy-one million, five hundred eighty-one thousand, two hundred eighty".