16511061551 has 2 divisors, whose sum is σ = 16511061552. Its totient is φ = 16511061550.

The previous prime is 16511061467. The next prime is 16511061563. The reversal of 16511061551 is 15516011561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16511061551 - 2¹⁸ = 16510799407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16511064551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8255530775 + 8255530776.

It is an arithmetic number, because the mean of its divisors is an integer number (8255530776).

Almost surely, 2^16511061551 is an apocalyptic number.

16511061551 is a deficient number, since it is larger than the sum of its proper divisors (1).

16511061551 is an equidigital number, since it uses as much as digits as its factorization.

16511061551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 16511061551 in words is "sixteen billion, five hundred eleven million, sixty-one thousand, five hundred fifty-one".