1889408540425 has 12 divisors (see below), whose sum is σ = 2677561817536. Its totient is φ = 1295594427600.

The previous prime is 1889408540389. The next prime is 1889408540441. The reversal of 1889408540425 is 5240458049881.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1889408540425 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1889408540425.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 5398309941 + ... + 5398310290.

Almost surely, 2^{1889408540425} is an apocalyptic number.

It is an amenable number.

1889408540425 is a deficient number, since it is larger than the sum of its proper divisors (788153277111).

1889408540425 is a wasteful number, since it uses less digits than its factorization.

1889408540425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10796620248 (or 10796620243 counting only the distinct ones).

The product of its (nonzero) digits is 14745600, while the sum is 58.

The spelling of 1889408540425 in words is "one trillion, eight hundred eighty-nine billion, four hundred eight million, five hundred forty thousand, four hundred twenty-five".