16512133645 has 16 divisors (see below), whose sum is σ = 22647329280. Its totient is φ = 11321547264.

The previous prime is 16512133637. The next prime is 16512133657. The reversal of 16512133645 is 54633121561.

It is a cyclic number.

It is not a de Polignac number, because 16512133645 - 2³ = 16512133637 is a prime.

It is a super-3 number, since 3×16512133645³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 624861 + ... + 650749.

It is an arithmetic number, because the mean of its divisors is an integer number (1415458080).

Almost surely, 2^16512133645 is an apocalyptic number.

It is an amenable number.

16512133645 is a deficient number, since it is larger than the sum of its proper divisors (6135195635).

16512133645 is a wasteful number, since it uses less digits than its factorization.

16512133645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44124.

The product of its digits is 64800, while the sum is 37.

The spelling of 16512133645 in words is "sixteen billion, five hundred twelve million, one hundred thirty-three thousand, six hundred forty-five".