1881171226367 has 4 divisors (see below), whose sum is σ = 1946039199720. Its totient is φ = 1816303253016.

The previous prime is 1881171226357. The next prime is 1881171226369. The reversal of 1881171226367 is 7636221711881.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1881171226367 is a prime.

It is a super-2 number, since 2×1881171226367² (a number of 25 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 (1881171226369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32433986633 + ... + 32433986690.

It is an arithmetic number, because the mean of its divisors is an integer number (486509799930).

Almost surely, 2^{1881171226367} is an apocalyptic number.

1881171226367 is a deficient number, since it is larger than the sum of its proper divisors (64867973353).

1881171226367 is an equidigital number, since it uses as much as digits as its factorization.

1881171226367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64867973352.

The product of its digits is 1354752, while the sum is 53.

The spelling of 1881171226367 in words is "one trillion, eight hundred eighty-one billion, one hundred seventy-one million, two hundred twenty-six thousand, three hundred sixty-seven".