1898681540807 has 2 divisors, whose sum is σ = 1898681540808. Its totient is φ = 1898681540806.

The previous prime is 1898681540761. The next prime is 1898681540867. The reversal of 1898681540807 is 7080451868981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1898681540807 - 2¹² = 1898681536711 is a prime.

It is a super-2 number, since 2×1898681540807² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1898681540867) 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 as a sum of consecutive naturals, namely, 949340770403 + 949340770404.

It is an arithmetic number, because the mean of its divisors is an integer number (949340770404).

Almost surely, 2^{1898681540807} is an apocalyptic number.

1898681540807 is a deficient number, since it is larger than the sum of its proper divisors (1).

1898681540807 is an equidigital number, since it uses as much as digits as its factorization.

1898681540807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30965760, while the sum is 65.

The spelling of 1898681540807 in words is "one trillion, eight hundred ninety-eight billion, six hundred eighty-one million, five hundred forty thousand, eight hundred seven".