4081749974921 has 8 divisors (see below), whose sum is σ = 4102699173504. Its totient is φ = 4060815912720.

The previous prime is 4081749974881. The next prime is 4081749974923. The reversal of 4081749974921 is 1294799471804.

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-4081749974921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4081749974923) 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, 3243185 + ... + 4322238.

It is an arithmetic number, because the mean of its divisors is an integer number (512837396688).

Almost surely, 2^{4081749974921} is an apocalyptic number.

It is an amenable number.

4081749974921 is a deficient number, since it is larger than the sum of its proper divisors (20949198583).

4081749974921 is a wasteful number, since it uses less digits than its factorization.

4081749974921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7568191.

The product of its (nonzero) digits is 36578304, while the sum is 65.

The spelling of 4081749974921 in words is "four trillion, eighty-one billion, seven hundred forty-nine million, nine hundred seventy-four thousand, nine hundred twenty-one".