898181378640 has 480 divisors, whose sum is σ = 3741749846016. Its totient is φ = 188012482560.

The previous prime is 898181378639. The next prime is 898181378671. The reversal of 898181378640 is 46873181898.

898181378640 is a `hidden beast` number, since 89 + 8 + 181 + 378 + 6 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8267070 + ... + 8375010.

Almost surely, 2^898181378640 is an apocalyptic number.

898181378640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 898181378640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1870874923008).

898181378640 is an abundant number, since it is smaller than the sum of its proper divisors (2843568467376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

898181378640 is a wasteful number, since it uses less digits than its factorization.

898181378640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108107 (or 108098 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 63.

The spelling of 898181378640 in words is "eight hundred ninety-eight billion, one hundred eighty-one million, three hundred seventy-eight thousand, six hundred forty".