74329027921 has 8 divisors (see below), whose sum is σ = 74723418440. Its totient is φ = 73934733312.

The previous prime is 74329027847. The next prime is 74329027951. The reversal of 74329027921 is 12972092347.

It can be written as a sum of positive squares in 4 ways, for example, as 9947070225 + 64381957696 = 99735^2 + 253736^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74329027921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74329027951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1963945 + ... + 2001433.

It is an arithmetic number, because the mean of its divisors is an integer number (9340427305).

Almost surely, 2^74329027921 is an apocalyptic number.

It is an amenable number.

74329027921 is a deficient number, since it is larger than the sum of its proper divisors (394390519).

74329027921 is a wasteful number, since it uses less digits than its factorization.

74329027921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47955.

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 74329027921 in words is "seventy-four billion, three hundred twenty-nine million, twenty-seven thousand, nine hundred twenty-one".