74327742721 has 8 divisors (see below), whose sum is σ = 78287850080. Its totient is φ = 70372447488.

The previous prime is 74327742673. The next prime is 74327742787. The reversal of 74327742721 is 12724772347.

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-74327742721 is a prime.

It is a super-2 number, since 2×74327742721² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74327712721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1171296 + ... + 1233121.

It is an arithmetic number, because the mean of its divisors is an integer number (9785981260).

Almost surely, 2^74327742721 is an apocalyptic number.

It is an amenable number.

74327742721 is a deficient number, since it is larger than the sum of its proper divisors (3960107359).

74327742721 is a wasteful number, since it uses less digits than its factorization.

74327742721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406063.

The product of its digits is 921984, while the sum is 46.

The spelling of 74327742721 in words is "seventy-four billion, three hundred twenty-seven million, seven hundred forty-two thousand, seven hundred twenty-one".