78475721280 has 1008 divisors, whose sum is σ = 305935197120. Its totient is φ = 16970342400.

The previous prime is 78475721273. The next prime is 78475721293. The reversal of 78475721280 is 8212757487.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2120965422 + ... + 2120965458.

It is an arithmetic number, because the mean of its divisors is an integer number (303507140).

Almost surely, 2^78475721280 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 78475721280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152967598560).

78475721280 is an abundant number, since it is smaller than the sum of its proper divisors (227459475840).

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

78475721280 is a wasteful number, since it uses less digits than its factorization.

78475721280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 1756160, while the sum is 51.

The spelling of 78475721280 in words is "seventy-eight billion, four hundred seventy-five million, seven hundred twenty-one thousand, two hundred eighty".