16565001055 has 8 divisors (see below), whose sum is σ = 19880012592. Its totient is φ = 13250659968.

The previous prime is 16565001031. The next prime is 16565001091. The reversal of 16565001055 is 55010056561.

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

It is a cyclic number.

It is not a de Polignac number, because 16565001055 - 2⁷ = 16565000927 is a prime.

It is a super-2 number, since 2×16565001055² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16565001055.

It is a congruent 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, 111549 + ... + 213478.

It is an arithmetic number, because the mean of its divisors is an integer number (2485001574).

Almost surely, 2^16565001055 is an apocalyptic number.

16565001055 is a deficient number, since it is larger than the sum of its proper divisors (3315011537).

16565001055 is a wasteful number, since it uses less digits than its factorization.

16565001055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335225.

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 16565001055 in words is "sixteen billion, five hundred sixty-five million, one thousand, fifty-five".