1889408540445 has 16 divisors (see below), whose sum is σ = 3120571525632. Its totient is φ = 975178601280.

The previous prime is 1889408540441. The next prime is 1889408540449. The reversal of 1889408540445 is 5440458049881.

It is an interprime number because it is at equal distance from previous prime (1889408540441) and next prime (1889408540449).

It is not a de Polignac number, because 1889408540445 - 2² = 1889408540441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889408540441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2031621622 + ... + 2031622551.

It is an arithmetic number, because the mean of its divisors is an integer number (195035720352).

Almost surely, 2^{1889408540445} is an apocalyptic number.

1889408540445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1889408540445 is a deficient number, since it is larger than the sum of its proper divisors (1231162985187).

1889408540445 is a wasteful number, since it uses less digits than its factorization.

1889408540445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4063244212.

The product of its (nonzero) digits is 29491200, while the sum is 60.

The spelling of 1889408540445 in words is "one trillion, eight hundred eighty-nine billion, four hundred eight million, five hundred forty thousand, four hundred forty-five".