16506015539 has 6 divisors (see below), whose sum is σ = 17873377956. Its totient is φ = 15236321880.

The previous prime is 16506015509. The next prime is 16506015563. The reversal of 16506015539 is 93551060561.

It is a happy number.

It is not a de Polignac number, because 16506015539 - 2¹² = 16506011443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16506015496 and 16506015505.

It is not an unprimeable number, because it can be changed into a prime (16506015509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48834197 + ... + 48834534.

It is an arithmetic number, because the mean of its divisors is an integer number (2978896326).

Almost surely, 2^16506015539 is an apocalyptic number.

16506015539 is a deficient number, since it is larger than the sum of its proper divisors (1367362417).

16506015539 is an equidigital number, since it uses as much as digits as its factorization.

16506015539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97668757 (or 97668744 counting only the distinct ones).

The product of its (nonzero) digits is 121500, while the sum is 41.

The spelling of 16506015539 in words is "sixteen billion, five hundred six million, fifteen thousand, five hundred thirty-nine".