74991545280 has 448 divisors, whose sum is σ = 273134937600. Its totient is φ = 19356917760.

The previous prime is 74991545269. The next prime is 74991545297. The reversal of 74991545280 is 8254519947.

It is a happy number.

74991545280 is a `hidden beast` number, since 7 + 4 + 9 + 91 + 545 + 2 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 63 ways as a sum of consecutive naturals, for example, 49238599 + ... + 49240121.

It is an arithmetic number, because the mean of its divisors is an integer number (609676200).

Almost surely, 2^74991545280 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 74991545280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136567468800).

74991545280 is an abundant number, since it is smaller than the sum of its proper divisors (198143392320).

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

74991545280 is a wasteful number, since it uses less digits than its factorization.

74991545280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729 (or 1713 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 74991545280 in words is "seventy-four billion, nine hundred ninety-one million, five hundred forty-five thousand, two hundred eighty".