16861870416 has 80 divisors (see below), whose sum is σ = 46156490240. Its totient is φ = 5289494400.

The previous prime is 16861870411. The next prime is 16861870457. The reversal of 16861870416 is 61407816861.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16861870411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76491 + ... + 198933.

It is an arithmetic number, because the mean of its divisors is an integer number (576956128).

Almost surely, 2^16861870416 is an apocalyptic number.

16861870416 is a gapful number since it is divisible by the number (16) 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 16861870416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23078245120).

16861870416 is an abundant number, since it is smaller than the sum of its proper divisors (29294619824).

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

16861870416 is a wasteful number, since it uses less digits than its factorization.

16861870416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122624 (or 122618 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 16861870416 in words is "sixteen billion, eight hundred sixty-one million, eight hundred seventy thousand, four hundred sixteen".