74349048721 has 4 divisors (see below), whose sum is σ = 75290176000. Its totient is φ = 73407921444.

The previous prime is 74349048707. The next prime is 74349048779. The reversal of 74349048721 is 12784094347.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12784094347 = 23 ⋅555830189.

It is a cyclic number.

It is not a de Polignac number, because 74349048721 - 2⁷ = 74349048593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74349043721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470563521 + ... + 470563678.

It is an arithmetic number, because the mean of its divisors is an integer number (18822544000).

Almost surely, 2^74349048721 is an apocalyptic number.

It is an amenable number.

74349048721 is a deficient number, since it is larger than the sum of its proper divisors (941127279).

74349048721 is an equidigital number, since it uses as much as digits as its factorization.

74349048721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941127278.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The spelling of 74349048721 in words is "seventy-four billion, three hundred forty-nine million, forty-eight thousand, seven hundred twenty-one".