16860187840 has 28 divisors (see below), whose sum is σ = 40148323056. Its totient is φ = 6744075008.

The previous prime is 16860187811. The next prime is 16860187849. The reversal of 16860187840 is 4878106861.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (16860187849) 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, 26343724 + ... + 26344363.

Almost surely, 2^16860187840 is an apocalyptic number.

16860187840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16860187840 is an abundant number, since it is smaller than the sum of its proper divisors (23288135216).

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

16860187840 is an equidigital number, since it uses as much as digits as its factorization.

16860187840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52688104 (or 52688094 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 49.

The spelling of 16860187840 in words is "sixteen billion, eight hundred sixty million, one hundred eighty-seven thousand, eight hundred forty".