16551588461 has 2 divisors, whose sum is σ = 16551588462. Its totient is φ = 16551588460.

The previous prime is 16551588457. The next prime is 16551588511. The reversal of 16551588461 is 16488515561.

It is an a-pointer prime, because the next prime (16551588511) can be obtained adding 16551588461 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16085848900 + 465739561 = 126830^2 + 21581^2 .

It is a cyclic number.

It is not a de Polignac number, because 16551588461 - 2² = 16551588457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16551588061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8275794230 + 8275794231.

It is an arithmetic number, because the mean of its divisors is an integer number (8275794231).

Almost surely, 2^16551588461 is an apocalyptic number.

It is an amenable number.

16551588461 is a deficient number, since it is larger than the sum of its proper divisors (1).

16551588461 is an equidigital number, since it uses as much as digits as its factorization.

16551588461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152000, while the sum is 50.

The spelling of 16551588461 in words is "sixteen billion, five hundred fifty-one million, five hundred eighty-eight thousand, four hundred sixty-one".