1889937562489 has 2 divisors, whose sum is σ = 1889937562490. Its totient is φ = 1889937562488.

The previous prime is 1889937562477. The next prime is 1889937562567. The reversal of 1889937562489 is 9842657399881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1882068453225 + 7869109264 = 1371885^2 + 88708^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1889937562489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1889937569489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944968781244 + 944968781245.

It is an arithmetic number, because the mean of its divisors is an integer number (944968781245).

Almost surely, 2^{1889937562489} is an apocalyptic number.

It is an amenable number.

1889937562489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1889937562489 is an equidigital number, since it uses as much as digits as its factorization.

1889937562489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1881169920, while the sum is 79.

The spelling of 1889937562489 in words is "one trillion, eight hundred eighty-nine billion, nine hundred thirty-seven million, five hundred sixty-two thousand, four hundred eighty-nine".