74020012783321 has 16 divisors (see below), whose sum is σ = 81423543616128. Its totient is φ = 66731088153600.

The previous prime is 74020012783309. The next prime is 74020012783331. The reversal of 74020012783321 is 12338721002047.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74020012783321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74020012783331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54320325 + ... + 55666306.

It is an arithmetic number, because the mean of its divisors is an integer number (5088971476008).

Almost surely, 2^{74020012783321} is an apocalyptic number.

It is an amenable number.

74020012783321 is a deficient number, since it is larger than the sum of its proper divisors (7403530832807).

74020012783321 is a wasteful number, since it uses less digits than its factorization.

74020012783321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109987152.

The product of its (nonzero) digits is 112896, while the sum is 40.

Adding to 74020012783321 its reverse (12338721002047), we get a palindrome (86358733785368).

The spelling of 74020012783321 in words is "seventy-four trillion, twenty billion, twelve million, seven hundred eighty-three thousand, three hundred twenty-one".