16691277952 has 16 divisors (see below), whose sum is σ = 33252155550. Its totient is φ = 8345638912.

The previous prime is 16691277929. The next prime is 16691277979. The reversal of 16691277952 is 25977219661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14164808256 + 2526469696 = 119016^2 + 50264^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 16691277893 and 16691277902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65200177 + ... + 65200432.

Almost surely, 2^16691277952 is an apocalyptic number.

It is an amenable number.

16691277952 is a deficient number, since it is larger than the sum of its proper divisors (16560877598).

16691277952 is an equidigital number, since it uses as much as digits as its factorization.

16691277952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130400623 (or 130400611 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 55.

The spelling of 16691277952 in words is "sixteen billion, six hundred ninety-one million, two hundred seventy-seven thousand, nine hundred fifty-two".