898181378639 has 2 divisors, whose sum is σ = 898181378640. Its totient is φ = 898181378638.

The previous prime is 898181378587. The next prime is 898181378671. The reversal of 898181378639 is 936873181898.

898181378639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 898181378639 - 2¹² = 898181374543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (898181371639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449090689319 + 449090689320.

It is an arithmetic number, because the mean of its divisors is an integer number (449090689320).

Almost surely, 2^898181378639 is an apocalyptic number.

898181378639 is a deficient number, since it is larger than the sum of its proper divisors (1).

898181378639 is an equidigital number, since it uses as much as digits as its factorization.

898181378639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125411328, while the sum is 71.

The spelling of 898181378639 in words is "eight hundred ninety-eight billion, one hundred eighty-one million, three hundred seventy-eight thousand, six hundred thirty-nine".