16504334551 has 2 divisors, whose sum is σ = 16504334552. Its totient is φ = 16504334550.

The previous prime is 16504334543. The next prime is 16504334557. The reversal of 16504334551 is 15543340561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16504334551 - 2³ = 16504334543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16504334551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16504334557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8252167275 + 8252167276.

It is an arithmetic number, because the mean of its divisors is an integer number (8252167276).

Almost surely, 2^16504334551 is an apocalyptic number.

16504334551 is a deficient number, since it is larger than the sum of its proper divisors (1).

16504334551 is an equidigital number, since it uses as much as digits as its factorization.

16504334551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 16504334551 in words is "sixteen billion, five hundred four million, three hundred thirty-four thousand, five hundred fifty-one".