1399510218889 has 2 divisors, whose sum is σ = 1399510218890. Its totient is φ = 1399510218888.

The previous prime is 1399510218817. The next prime is 1399510218913. The reversal of 1399510218889 is 9888120159931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1370988075664 + 28522143225 = 1170892^2 + 168885^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399510218889 - 2⁷ = 1399510218761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1399510218889.

It is not a weakly prime, because it can be changed into another prime (1399510218289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699755109444 + 699755109445.

It is an arithmetic number, because the mean of its divisors is an integer number (699755109445).

Almost surely, 2^{1399510218889} is an apocalyptic number.

It is an amenable number.

1399510218889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399510218889 is an equidigital number, since it uses as much as digits as its factorization.

1399510218889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11197440, while the sum is 64.

The spelling of 1399510218889 in words is "one trillion, three hundred ninety-nine billion, five hundred ten million, two hundred eighteen thousand, eight hundred eighty-nine".