16765551656 has 32 divisors (see below), whose sum is σ = 36053163840. Its totient is φ = 7159840128.

The previous prime is 16765551653. The next prime is 16765551679. The reversal of 16765551656 is 65615556761.

It is a junction number, because it is equal to n+sod(n) for n = 16765551598 and 16765551607.

It is not an unprimeable number, because it can be changed into a prime (16765551653) 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, 513101 + ... + 544796.

It is an arithmetic number, because the mean of its divisors is an integer number (1126661370).

Almost surely, 2^16765551656 is an apocalyptic number.

It is an amenable number.

16765551656 is an abundant number, since it is smaller than the sum of its proper divisors (19287612184).

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

16765551656 is a wasteful number, since it uses less digits than its factorization.

16765551656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058193 (or 1058189 counting only the distinct ones).

The product of its digits is 5670000, while the sum is 53.

The spelling of 16765551656 in words is "sixteen billion, seven hundred sixty-five million, five hundred fifty-one thousand, six hundred fifty-six".