16506145277 has 2 divisors, whose sum is σ = 16506145278. Its totient is φ = 16506145276.

The previous prime is 16506145237. The next prime is 16506145283. The reversal of 16506145277 is 77254160561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14948974756 + 1557170521 = 122266^2 + 39461^2 .

It is a cyclic number.

It is not a de Polignac number, because 16506145277 - 2¹² = 16506141181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16506145237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8253072638 + 8253072639.

It is an arithmetic number, because the mean of its divisors is an integer number (8253072639).

Almost surely, 2^16506145277 is an apocalyptic number.

It is an amenable number.

16506145277 is a deficient number, since it is larger than the sum of its proper divisors (1).

16506145277 is an equidigital number, since it uses as much as digits as its factorization.

16506145277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 16506145277 in words is "sixteen billion, five hundred six million, one hundred forty-five thousand, two hundred seventy-seven".