9941137843849 has 3 divisors (see below), whose sum is σ = 9941140996807. Its totient is φ = 9941134690892.

The previous prime is 9941137843837. The next prime is 9941137843951. The reversal of 9941137843849 is 9483487311499.

The square root of 9941137843849 is 3152957.

It is a perfect power (a square), and thus also a powerful number.

9941137843849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 866993765625 + 9074144078224 = 931125^2 + 3012332^2 .

It is not a de Polignac number, because 9941137843849 - 2¹¹ = 9941137841801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9941137843829) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1576479 + ... + 4729435.

Almost surely, 2^{9941137843849} is an apocalyptic number.

9941137843849 is the 3152957-th square number.

9941137843849 is the 1576479-th centered octagonal number.

It is an amenable number.

9941137843849 is a deficient number, since it is larger than the sum of its proper divisors (3152958).

9941137843849 is an frugal number, since it uses more digits than its factorization.

9941137843849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6305914 (or 3152957 counting only the distinct ones).

The product of its digits is 188116992, while the sum is 70.

The spelling of 9941137843849 in words is "nine trillion, nine hundred forty-one billion, one hundred thirty-seven million, eight hundred forty-three thousand, eight hundred forty-nine".