16507299329 has 4 divisors (see below), whose sum is σ = 16508826180. Its totient is φ = 16505772480.

The previous prime is 16507299257. The next prime is 16507299331. The reversal of 16507299329 is 92399270561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180848704 + 16326450625 = 13448^2 + 127775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16507299329 is a prime.

It is a super-2 number, since 2×16507299329² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16507299359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 747092 + ... + 768869.

It is an arithmetic number, because the mean of its divisors is an integer number (4127206545).

Almost surely, 2^16507299329 is an apocalyptic number.

It is an amenable number.

16507299329 is a deficient number, since it is larger than the sum of its proper divisors (1526851).

16507299329 is a wasteful number, since it uses less digits than its factorization.

16507299329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526850.

The product of its (nonzero) digits is 1837080, while the sum is 53.

The spelling of 16507299329 in words is "sixteen billion, five hundred seven million, two hundred ninety-nine thousand, three hundred twenty-nine".