11849724158981 has 2 divisors, whose sum is σ = 11849724158982. Its totient is φ = 11849724158980.

The previous prime is 11849724158971. The next prime is 11849724159017. The reversal of 11849724158981 is 18985142794811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6744876468100 + 5104847690881 = 2597090^2 + 2259391^2 .

It is a cyclic number.

It is not a de Polignac number, because 11849724158981 - 2³⁰ = 11848650417157 is a prime.

It is a super-2 number, since 2×11849724158981² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11849724158941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5924862079490 + 5924862079491.

It is an arithmetic number, because the mean of its divisors is an integer number (5924862079491).

Almost surely, 2^{11849724158981} is an apocalyptic number.

It is an amenable number.

11849724158981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11849724158981 is an equidigital number, since it uses as much as digits as its factorization.

11849724158981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46448640, while the sum is 68.

The spelling of 11849724158981 in words is "eleven trillion, eight hundred forty-nine billion, seven hundred twenty-four million, one hundred fifty-eight thousand, nine hundred eighty-one".