16510066451 has 4 divisors (see below), whose sum is σ = 16528765032. Its totient is φ = 16491367872.

The previous prime is 16510066403. The next prime is 16510066483. The reversal of 16510066451 is 15466001561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15466001561 = 47 ⋅329063863.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16510066451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16510066151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9347966 + ... + 9349731.

It is an arithmetic number, because the mean of its divisors is an integer number (4132191258).

Almost surely, 2^16510066451 is an apocalyptic number.

16510066451 is a deficient number, since it is larger than the sum of its proper divisors (18698581).

16510066451 is an equidigital number, since it uses as much as digits as its factorization.

16510066451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18698580.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 16510066451 in words is "sixteen billion, five hundred ten million, sixty-six thousand, four hundred fifty-one".