74733121728 has 84 divisors (see below), whose sum is σ = 226809559080. Its totient is φ = 23445682176.

The previous prime is 74733121699. The next prime is 74733121763. The reversal of 74733121728 is 82712133747.

74733121728 is a `hidden beast` number, since 7 + 473 + 3 + 1 + 2 + 172 + 8 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3806238 + ... + 3825821.

Almost surely, 2^74733121728 is an apocalyptic number.

It is an amenable number.

74733121728 is an abundant number, since it is smaller than the sum of its proper divisors (152076437352).

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

74733121728 is a wasteful number, since it uses less digits than its factorization.

74733121728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7632094 (or 7632081 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The spelling of 74733121728 in words is "seventy-four billion, seven hundred thirty-three million, one hundred twenty-one thousand, seven hundred twenty-eight".