16545633553 has 8 divisors (see below), whose sum is σ = 16920079200. Its totient is φ = 16174321728.

The previous prime is 16545633547. The next prime is 16545633563. The reversal of 16545633553 is 35533654561.

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-16545633553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16545633563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 772776 + ... + 793897.

It is an arithmetic number, because the mean of its divisors is an integer number (2115009900).

Almost surely, 2^16545633553 is an apocalyptic number.

It is an amenable number.

16545633553 is a deficient number, since it is larger than the sum of its proper divisors (374445647).

16545633553 is a wasteful number, since it uses less digits than its factorization.

16545633553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566911.

The product of its digits is 2430000, while the sum is 46.

The spelling of 16545633553 in words is "sixteen billion, five hundred forty-five million, six hundred thirty-three thousand, five hundred fifty-three".