1897445640483 has 24 divisors (see below), whose sum is σ = 2808356634720. Its totient is φ = 1233779495040.

The previous prime is 1897445640451. The next prime is 1897445640499. The reversal of 1897445640483 is 3840465447981.

1897445640483 is a `hidden beast` number, since 1 + 8 + 9 + 74 + 45 + 6 + 40 + 483 = 666.

It is a Cunningham number, because it is equal to 1377478²-1.

It is not a de Polignac number, because 1897445640483 - 2⁵ = 1897445640451 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1897445640483.

It is not an unprimeable number, because it can be changed into a prime (1897445640283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 688738 + ... + 2066216.

It is an arithmetic number, because the mean of its divisors is an integer number (117014859780).

Almost surely, 2^{1897445640483} is an apocalyptic number.

1897445640483 is a deficient number, since it is larger than the sum of its proper divisors (910910994237).

1897445640483 is a wasteful number, since it uses less digits than its factorization.

1897445640483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381259 (or 1381256 counting only the distinct ones).

The product of its (nonzero) digits is 92897280, while the sum is 63.

The spelling of 1897445640483 in words is "one trillion, eight hundred ninety-seven billion, four hundred forty-five million, six hundred forty thousand, four hundred eighty-three".