4149891969956 has 18 divisors (see below), whose sum is σ = 7439487250482. Its totient is φ = 2024324820480.

The previous prime is 4149891969953. The next prime is 4149891970009. The reversal of 4149891969956 is 6599691989414.

4149891969956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1146325683556 + 3003566286400 = 1070666^2 + 1733080^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4149891969953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26008436 + ... + 26167508.

It is an arithmetic number, because the mean of its divisors is an integer number (413304847249).

Almost surely, 2^{4149891969956} is an apocalyptic number.

It is an amenable number.

4149891969956 is a deficient number, since it is larger than the sum of its proper divisors (3289595280526).

4149891969956 is an frugal number, since it uses more digits than its factorization.

4149891969956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318191 (or 159116 counting only the distinct ones).

The product of its digits is 1360488960, while the sum is 80.

The spelling of 4149891969956 in words is "four trillion, one hundred forty-nine billion, eight hundred ninety-one million, nine hundred sixty-nine thousand, nine hundred fifty-six".