1838969221611 has 32 divisors (see below), whose sum is σ = 2587523699200. Its totient is φ = 1158524156160.

The previous prime is 1838969221601. The next prime is 1838969221613. The reversal of 1838969221611 is 1161229698381.

It is a happy number.

It is not a de Polignac number, because 1838969221611 - 2¹⁵ = 1838969188843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1838969221613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155562081 + ... + 155573901.

It is an arithmetic number, because the mean of its divisors is an integer number (80860115600).

Almost surely, 2^{1838969221611} is an apocalyptic number.

1838969221611 is a deficient number, since it is larger than the sum of its proper divisors (748554477589).

1838969221611 is a wasteful number, since it uses less digits than its factorization.

1838969221611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18499.

The product of its digits is 2239488, while the sum is 57.

The spelling of 1838969221611 in words is "one trillion, eight hundred thirty-eight billion, nine hundred sixty-nine million, two hundred twenty-one thousand, six hundred eleven".