74451379328 has 64 divisors (see below), whose sum is σ = 150108147000. Its totient is φ = 36777861120.

The previous prime is 74451379309. The next prime is 74451379399. The reversal of 74451379328 is 82397315447.

It can be written as a sum of positive squares in 4 ways, for example, as 74118973504 + 332405824 = 272248^2 + 18232^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 74451379328.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23112758 + ... + 23115978.

Almost surely, 2^74451379328 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 74451379328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75054073500).

74451379328 is an abundant number, since it is smaller than the sum of its proper divisors (75656767672).

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

74451379328 is a wasteful number, since it uses less digits than its factorization.

74451379328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5353 (or 5341 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 53.

The spelling of 74451379328 in words is "seventy-four billion, four hundred fifty-one million, three hundred seventy-nine thousand, three hundred twenty-eight".