1921144653226 has 8 divisors (see below), whose sum is σ = 2897815957920. Its totient is φ = 955206000588.

The previous prime is 1921144653173. The next prime is 1921144653227. The reversal of 1921144653226 is 6223564411291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1921144653227) 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, 2683162566 + ... + 2683163281.

It is an arithmetic number, because the mean of its divisors is an integer number (362226994740).

Almost surely, 2^{1921144653226} is an apocalyptic number.

1921144653226 is a deficient number, since it is larger than the sum of its proper divisors (976671304694).

1921144653226 is a wasteful number, since it uses less digits than its factorization.

1921144653226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5366326028.

The product of its digits is 622080, while the sum is 46.

The spelling of 1921144653226 in words is "one trillion, nine hundred twenty-one billion, one hundred forty-four million, six hundred fifty-three thousand, two hundred twenty-six".