16488397565 has 8 divisors (see below), whose sum is σ = 19786845240. Its totient is φ = 13190205952.

The previous prime is 16488397493. The next prime is 16488397567. The reversal of 16488397565 is 56579388461.

It can be written as a sum of positive squares in 4 ways, for example, as 1154776324 + 15333621241 = 33982^2 + 123829^2 .

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 16488397565 - 2²² = 16484203261 is a prime.

It is a super-2 number, since 2×16488397565² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16488397498 and 16488397507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16488397567) 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, 132497 + ... + 224793.

It is an arithmetic number, because the mean of its divisors is an integer number (2473355655).

Almost surely, 2^16488397565 is an apocalyptic number.

It is an amenable number.

16488397565 is a deficient number, since it is larger than the sum of its proper divisors (3298447675).

16488397565 is an equidigital number, since it uses as much as digits as its factorization.

16488397565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128031.

The product of its digits is 43545600, while the sum is 62.

The spelling of 16488397565 in words is "sixteen billion, four hundred eighty-eight million, three hundred ninety-seven thousand, five hundred sixty-five".