74821616928 has 72 divisors (see below), whose sum is σ = 225290103948. Its totient is φ = 23473446912.

The previous prime is 74821616927. The next prime is 74821616951. The reversal of 74821616928 is 82961612847.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 61470276624 + 13351340304 = 247932^2 + 115548^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (74821616921) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 7636201 + ... + 7645992.

Almost surely, 2^74821616928 is an apocalyptic number.

It is an amenable number.

74821616928 is an abundant number, since it is smaller than the sum of its proper divisors (150468487020).

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

74821616928 is a wasteful number, since it uses less digits than its factorization.

74821616928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15282226 (or 15282215 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The spelling of 74821616928 in words is "seventy-four billion, eight hundred twenty-one million, six hundred sixteen thousand, nine hundred twenty-eight".