16502515145 has 8 divisors (see below), whose sum is σ = 20967901704. Its totient is φ = 12425423104.

The previous prime is 16502515109. The next prime is 16502515219. The reversal of 16502515145 is 54151520561.

It can be written as a sum of positive squares in 4 ways, for example, as 5533723321 + 10968791824 = 74389^2 + 104732^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16502515145 is a prime.

It is a super-2 number, since 2×16502515145² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97073534 + ... + 97073703.

It is an arithmetic number, because the mean of its divisors is an integer number (2620987713).

Almost surely, 2^16502515145 is an apocalyptic number.

It is an amenable number.

16502515145 is a deficient number, since it is larger than the sum of its proper divisors (4465386559).

16502515145 is a wasteful number, since it uses less digits than its factorization.

16502515145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194147259.

The product of its (nonzero) digits is 30000, while the sum is 35.

The spelling of 16502515145 in words is "sixteen billion, five hundred two million, five hundred fifteen thousand, one hundred forty-five".