16788771840 has 352 divisors, whose sum is σ = 56156841216. Its totient is φ = 4276879360.

The previous prime is 16788771781. The next prime is 16788771841. The reversal of 16788771840 is 4817788761.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16788771841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33377029 + ... + 33377531.

Almost surely, 2^16788771840 is an apocalyptic number.

16788771840 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 16788771840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28078420608).

16788771840 is an abundant number, since it is smaller than the sum of its proper divisors (39368069376).

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

16788771840 is a wasteful number, since it uses less digits than its factorization.

16788771840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 4214784, while the sum is 57.

The spelling of 16788771840 in words is "sixteen billion, seven hundred eighty-eight million, seven hundred seventy-one thousand, eight hundred forty".