1921289967325 has 24 divisors (see below), whose sum is σ = 2417805875520. Its totient is φ = 1514222371200.

The previous prime is 1921289967299. The next prime is 1921289967391. The reversal of 1921289967325 is 5237699821291.

It is a happy number.

It is not a de Polignac number, because 1921289967325 - 2¹³ = 1921289959133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1905841 + ... + 2734009.

It is an arithmetic number, because the mean of its divisors is an integer number (100741911480).

Almost surely, 2^{1921289967325} is an apocalyptic number.

It is an amenable number.

1921289967325 is a deficient number, since it is larger than the sum of its proper divisors (496515908195).

1921289967325 is a wasteful number, since it uses less digits than its factorization.

1921289967325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829557 (or 829552 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 64.

The spelling of 1921289967325 in words is "one trillion, nine hundred twenty-one billion, two hundred eighty-nine million, nine hundred sixty-seven thousand, three hundred twenty-five".