1890934578853 has 4 divisors (see below), whose sum is σ = 1942040918860. Its totient is φ = 1839828238848.

The previous prime is 1890934578851. The next prime is 1890934578859. The reversal of 1890934578853 is 3588754390981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1597172746849 + 293761832004 = 1263793^2 + 541998^2 .

It is a cyclic number.

It is not a de Polignac number, because 1890934578853 - 2¹ = 1890934578851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890934578851) 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 3 ways as a sum of consecutive naturals, for example, 25553169948 + ... + 25553170021.

It is an arithmetic number, because the mean of its divisors is an integer number (485510229715).

Almost surely, 2^{1890934578853} is an apocalyptic number.

It is an amenable number.

1890934578853 is a deficient number, since it is larger than the sum of its proper divisors (51106340007).

1890934578853 is an equidigital number, since it uses as much as digits as its factorization.

1890934578853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51106340006.

The product of its (nonzero) digits is 261273600, while the sum is 70.

The spelling of 1890934578853 in words is "one trillion, eight hundred ninety billion, nine hundred thirty-four million, five hundred seventy-eight thousand, eight hundred fifty-three".