16509937263 has 16 divisors (see below), whose sum is σ = 22187753952. Its totient is φ = 10919664000.

The previous prime is 16509937261. The next prime is 16509937321. The reversal of 16509937263 is 36273990561.

It is a happy number.

It is not a de Polignac number, because 16509937263 - 2¹ = 16509937261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16509937261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192493 + ... + 264713.

It is an arithmetic number, because the mean of its divisors is an integer number (1386734622).

Almost surely, 2^16509937263 is an apocalyptic number.

16509937263 is a deficient number, since it is larger than the sum of its proper divisors (5677816689).

16509937263 is a wasteful number, since it uses less digits than its factorization.

16509937263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72826.

The product of its (nonzero) digits is 1837080, while the sum is 51.

The spelling of 16509937263 in words is "sixteen billion, five hundred nine million, nine hundred thirty-seven thousand, two hundred sixty-three".