898181378641 has 4 divisors (see below), whose sum is σ = 945454082800. Its totient is φ = 850908674484.

The previous prime is 898181378639. The next prime is 898181378671. The reversal of 898181378641 is 146873181898.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 898181378641 - 2¹ = 898181378639 is a prime.

It is a super-2 number, since 2×898181378641² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (898181378671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23636352051 + ... + 23636352088.

It is an arithmetic number, because the mean of its divisors is an integer number (236363520700).

Almost surely, 2^898181378641 is an apocalyptic number.

It is an amenable number.

898181378641 is a deficient number, since it is larger than the sum of its proper divisors (47272704159).

898181378641 is a wasteful number, since it uses less digits than its factorization.

898181378641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47272704158.

The product of its digits is 18579456, while the sum is 64.

The spelling of 898181378641 in words is "eight hundred ninety-eight billion, one hundred eighty-one million, three hundred seventy-eight thousand, six hundred forty-one".