1933638387969 has 8 divisors (see below), whose sum is σ = 2578195626880. Its totient is φ = 1289086703856.

The previous prime is 1933638387913. The next prime is 1933638387973. The reversal of 1933638387969 is 9697838363391.

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

It is not a de Polignac number, because 1933638387969 - 2⁷ = 1933638387841 is a prime.

It is a super-2 number, since 2×1933638387969² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1933638387969.

It is not an unprimeable number, because it can be changed into a prime (1933638377969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494137 + ... + 2027670.

It is an arithmetic number, because the mean of its divisors is an integer number (322274453360).

Almost surely, 2^{1933638387969} is an apocalyptic number.

It is an amenable number.

1933638387969 is a deficient number, since it is larger than the sum of its proper divisors (644557238911).

1933638387969 is a wasteful number, since it uses less digits than its factorization.

1933638387969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777399.

The product of its digits is 952342272, while the sum is 75.

The spelling of 1933638387969 in words is "one trillion, nine hundred thirty-three billion, six hundred thirty-eight million, three hundred eighty-seven thousand, nine hundred sixty-nine".