1881158441801 has 4 divisors (see below), whose sum is σ = 1881162838212. Its totient is φ = 1881154045392.

The previous prime is 1881158441753. The next prime is 1881158441837. The reversal of 1881158441801 is 1081448511881.

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

It can be written as a sum of positive squares in 2 ways, for example, as 760905545401 + 1120252896400 = 872299^2 + 1058420^2 .

It is a cyclic number.

It is not a de Polignac number, because 1881158441801 - 2²⁶ = 1881091332937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1881158441801.

It is not an unprimeable number, because it can be changed into a prime (1881158444801) 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, 1477646 + ... + 2438391.

It is an arithmetic number, because the mean of its divisors is an integer number (470290709553).

Almost surely, 2^{1881158441801} is an apocalyptic number.

It is an amenable number.

1881158441801 is a deficient number, since it is larger than the sum of its proper divisors (4396411).

1881158441801 is an equidigital number, since it uses as much as digits as its factorization.

1881158441801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4396410.

The product of its (nonzero) digits is 327680, while the sum is 50.

The spelling of 1881158441801 in words is "one trillion, eight hundred eighty-one billion, one hundred fifty-eight million, four hundred forty-one thousand, eight hundred one".