74308867721 has 16 divisors (see below), whose sum is σ = 83975149440. Its totient is φ = 65134164480.

The previous prime is 74308867709. The next prime is 74308867747. The reversal of 74308867721 is 12776880347.

It is not a de Polignac number, because 74308867721 - 2³⁰ = 73235125897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74308867021) 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 15 ways as a sum of consecutive naturals, for example, 71705 + ... + 392121.

It is an arithmetic number, because the mean of its divisors is an integer number (5248446840).

Almost surely, 2^74308867721 is an apocalyptic number.

It is an amenable number.

74308867721 is a deficient number, since it is larger than the sum of its proper divisors (9666281719).

74308867721 is a wasteful number, since it uses less digits than its factorization.

74308867721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321184.

The product of its (nonzero) digits is 3161088, while the sum is 53.

The spelling of 74308867721 in words is "seventy-four billion, three hundred eight million, eight hundred sixty-seven thousand, seven hundred twenty-one".