16501265005 has 16 divisors (see below), whose sum is σ = 20086704000. Its totient is φ = 13012242880.

The previous prime is 16501264991. The next prime is 16501265009. The reversal of 16501265005 is 50056210561.

It is a de Polignac number, because none of the positive numbers 2^k-16501265005 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16501265009) 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, 13056 + ... + 182134.

It is an arithmetic number, because the mean of its divisors is an integer number (1255419000).

Almost surely, 2^16501265005 is an apocalyptic number.

It is an amenable number.

16501265005 is a deficient number, since it is larger than the sum of its proper divisors (3585438995).

16501265005 is a wasteful number, since it uses less digits than its factorization.

16501265005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169364.

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 16501265005 its reverse (50056210561), we get a palindrome (66557475566).

The spelling of 16501265005 in words is "sixteen billion, five hundred one million, two hundred sixty-five thousand, five".