16504632451 has 4 divisors (see below), whose sum is σ = 16907184504. Its totient is φ = 16102080400.

The previous prime is 16504632401. The next prime is 16504632493. The reversal of 16504632451 is 15423640561.

16504632451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16504632451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16504632451.

It is not an unprimeable number, because it can be changed into a prime (16504632401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201275965 + ... + 201276046.

It is an arithmetic number, because the mean of its divisors is an integer number (4226796126).

Almost surely, 2^16504632451 is an apocalyptic number.

16504632451 is a deficient number, since it is larger than the sum of its proper divisors (402552053).

16504632451 is an equidigital number, since it uses as much as digits as its factorization.

16504632451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402552052.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 16504632451 in words is "sixteen billion, five hundred four million, six hundred thirty-two thousand, four hundred fifty-one".