16416771840 has 648 divisors, whose sum is σ = 66884912640. Its totient is φ = 3706601472.

The previous prime is 16416771823. The next prime is 16416771851. The reversal of 16416771840 is 4817761461.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 71688846 + ... + 71689074.

Almost surely, 2^16416771840 is an apocalyptic number.

16416771840 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 16416771840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33442456320).

16416771840 is an abundant number, since it is smaller than the sum of its proper divisors (50468140800).

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

16416771840 is a wasteful number, since it uses less digits than its factorization.

16416771840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 16416771840 in words is "sixteen billion, four hundred sixteen million, seven hundred seventy-one thousand, eight hundred forty".