16775128651 has 2 divisors, whose sum is σ = 16775128652. Its totient is φ = 16775128650.

The previous prime is 16775128631. The next prime is 16775128661. The reversal of 16775128651 is 15682157761.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (15682157761) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16775128651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16775128595 and 16775128604.

It is not a weakly prime, because it can be changed into another prime (16775128631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8387564325 + 8387564326.

It is an arithmetic number, because the mean of its divisors is an integer number (8387564326).

Almost surely, 2^16775128651 is an apocalyptic number.

16775128651 is a deficient number, since it is larger than the sum of its proper divisors (1).

16775128651 is an equidigital number, since it uses as much as digits as its factorization.

16775128651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705600, while the sum is 49.

The spelling of 16775128651 in words is "sixteen billion, seven hundred seventy-five million, one hundred twenty-eight thousand, six hundred fifty-one".