16506146497 has 2 divisors, whose sum is σ = 16506146498.
Its totient is φ = 16506146496.
The previous prime is 16506146471. The next prime is 16506146519. The reversal of 16506146497 is 79464160561.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 9919363216 + 6586783281 = 99596^2 + 81159^2
It is a cyclic number.
It is not a de Polignac number, because 16506146497 - 223 = 16497757889 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 16506146497.
It is not a weakly prime, because it can be changed into another prime (16506146407) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8253073248 + 8253073249.
It is an arithmetic number, because the mean of its divisors is an integer number (8253073249).
Almost surely, 216506146497 is an apocalyptic number.
It is an amenable number.
16506146497 is a deficient number, since it is larger than the sum of its proper divisors (1).
16506146497 is an equidigital number, since it uses as much as digits as its factorization.
16506146497 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 1088640, while the sum is 49.
The spelling of 16506146497 in words is "sixteen billion, five hundred six million, one hundred forty-six thousand, four hundred ninety-seven".