16871655880 has 32 divisors (see below), whose sum is σ = 38096344440. Its totient is φ = 6724641280.

The previous prime is 16871655877. The next prime is 16871655881. The reversal of 16871655880 is 8855617861.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15835202244 + 1036453636 = 125838^2 + 32194^2 .

It is not an unprimeable number, because it can be changed into a prime (16871655881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 739279 + ... + 761758.

Almost surely, 2^16871655880 is an apocalyptic number.

16871655880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16871655880 is an abundant number, since it is smaller than the sum of its proper divisors (21224688560).

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

16871655880 is a wasteful number, since it uses less digits than its factorization.

16871655880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501329 (or 1501325 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 55.

The spelling of 16871655880 in words is "sixteen billion, eight hundred seventy-one million, six hundred fifty-five thousand, eight hundred eighty".