898181378638 has 8 divisors (see below), whose sum is σ = 1347276359232. Its totient is φ = 449089258896.

The previous prime is 898181378587. The next prime is 898181378639. The reversal of 898181378638 is 836873181898.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (898181378639) 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 in 3 ways as a sum of consecutive naturals, for example, 448131 + ... + 1413217.

It is an arithmetic number, because the mean of its divisors is an integer number (168409544904).

Almost surely, 2^898181378638 is an apocalyptic number.

898181378638 is a deficient number, since it is larger than the sum of its proper divisors (449094980594).

898181378638 is a wasteful number, since it uses less digits than its factorization.

898181378638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430426.

The product of its digits is 111476736, while the sum is 70.

The spelling of 898181378638 in words is "eight hundred ninety-eight billion, one hundred eighty-one million, three hundred seventy-eight thousand, six hundred thirty-eight".