3926181136181 has 4 divisors (see below), whose sum is σ = 3936879177792. Its totient is φ = 3915483094572.

The previous prime is 3926181136159. The next prime is 3926181136201. The reversal of 3926181136181 is 1816311816293.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3926181136181 - 2⁶ = 3926181136117 is a prime.

It is a super-2 number, since 2×3926181136181² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3926181136081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5349020255 + ... + 5349020988.

It is an arithmetic number, because the mean of its divisors is an integer number (984219794448).

Almost surely, 2^{3926181136181} is an apocalyptic number.

It is an amenable number.

3926181136181 is a deficient number, since it is larger than the sum of its proper divisors (10698041611).

3926181136181 is a wasteful number, since it uses less digits than its factorization.

3926181136181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10698041610.

The product of its digits is 373248, while the sum is 50.

The spelling of 3926181136181 in words is "three trillion, nine hundred twenty-six billion, one hundred eighty-one million, one hundred thirty-six thousand, one hundred eighty-one".