16401798140 has 144 divisors (see below), whose sum is σ = 42766133760. Its totient is φ = 5173758720.

The previous prime is 16401798121. The next prime is 16401798173. The reversal of 16401798140 is 4189710461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8492975 + ... + 8494905.

It is an arithmetic number, because the mean of its divisors is an integer number (296987040).

Almost surely, 2^16401798140 is an apocalyptic number.

16401798140 is a gapful number since it is divisible by the number (10) 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 16401798140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21383066880).

16401798140 is an abundant number, since it is smaller than the sum of its proper divisors (26364335620).

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

16401798140 is a wasteful number, since it uses less digits than its factorization.

16401798140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332 (or 2317 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The spelling of 16401798140 in words is "sixteen billion, four hundred one million, seven hundred ninety-eight thousand, one hundred forty".