16515291263 has 16 divisors (see below), whose sum is σ = 17046881280. Its totient is φ = 15990984576.

The previous prime is 16515291241. The next prime is 16515291271. The reversal of 16515291263 is 36219251561.

It is a cyclic number.

It is not a de Polignac number, because 16515291263 - 2³⁰ = 15441549439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16515291263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16515291293) 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, 2590706 + ... + 2597072.

It is an arithmetic number, because the mean of its divisors is an integer number (1065430080).

Almost surely, 2^16515291263 is an apocalyptic number.

16515291263 is a deficient number, since it is larger than the sum of its proper divisors (531590017).

16515291263 is a wasteful number, since it uses less digits than its factorization.

16515291263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6926.

The product of its digits is 97200, while the sum is 41.

The spelling of 16515291263 in words is "sixteen billion, five hundred fifteen million, two hundred ninety-one thousand, two hundred sixty-three".