1869378435421 has 8 divisors (see below), whose sum is σ = 2138074654464. Its totient is φ = 1601092755600.

The previous prime is 1869378435383. The next prime is 1869378435427. The reversal of 1869378435421 is 1245348739681.

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

It is a cyclic number.

It is not a de Polignac number, because 1869378435421 - 2⁷ = 1869378435293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1869378435421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1869378435427) 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, 102625045 + ... + 102643258.

It is an arithmetic number, because the mean of its divisors is an integer number (267259331808).

Almost surely, 2^{1869378435421} is an apocalyptic number.

It is an amenable number.

1869378435421 is a deficient number, since it is larger than the sum of its proper divisors (268696219043).

1869378435421 is a wasteful number, since it uses less digits than its factorization.

1869378435421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205269611.

The product of its digits is 34836480, while the sum is 61.

The spelling of 1869378435421 in words is "one trillion, eight hundred sixty-nine billion, three hundred seventy-eight million, four hundred thirty-five thousand, four hundred twenty-one".