16128661247 has 8 divisors (see below), whose sum is σ = 16179058080. Its totient is φ = 16078295520.

The previous prime is 16128661223. The next prime is 16128661259. The reversal of 16128661247 is 74216682161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16128661247 - 2¹² = 16128657151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16128661198 and 16128661207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16128661207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1437953 + ... + 1449125.

It is an arithmetic number, because the mean of its divisors is an integer number (2022382260).

Almost surely, 2^16128661247 is an apocalyptic number.

16128661247 is a deficient number, since it is larger than the sum of its proper divisors (50396833).

16128661247 is a wasteful number, since it uses less digits than its factorization.

16128661247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15553.

The product of its digits is 193536, while the sum is 44.

The spelling of 16128661247 in words is "sixteen billion, one hundred twenty-eight million, six hundred sixty-one thousand, two hundred forty-seven".