16881771616 has 12 divisors (see below), whose sum is σ = 33235987932. Its totient is φ = 8440885792.

The previous prime is 16881771593. The next prime is 16881771661. The reversal of 16881771616 is 61617718861.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263777650 + ... + 263777713.

It is an arithmetic number, because the mean of its divisors is an integer number (2769665661).

Almost surely, 2^16881771616 is an apocalyptic number.

16881771616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16881771616 is a deficient number, since it is larger than the sum of its proper divisors (16354216316).

16881771616 is an equidigital number, since it uses as much as digits as its factorization.

16881771616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527555373 (or 527555365 counting only the distinct ones).

The product of its digits is 677376, while the sum is 52.

The spelling of 16881771616 in words is "sixteen billion, eight hundred eighty-one million, seven hundred seventy-one thousand, six hundred sixteen".