16955450565 has 32 divisors (see below), whose sum is σ = 30236353920. Its totient is φ = 8063023104.

The previous prime is 16955450563. The next prime is 16955450591. The reversal of 16955450565 is 56505455961.

It is not a de Polignac number, because 16955450565 - 2¹ = 16955450563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16955450563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1744944 + ... + 1754633.

It is an arithmetic number, because the mean of its divisors is an integer number (944886060).

Almost surely, 2^16955450565 is an apocalyptic number.

16955450565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16955450565 is a deficient number, since it is larger than the sum of its proper divisors (13280903355).

16955450565 is a wasteful number, since it uses less digits than its factorization.

16955450565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3499621.

The product of its (nonzero) digits is 4050000, while the sum is 51.

The spelling of 16955450565 in words is "sixteen billion, nine hundred fifty-five million, four hundred fifty thousand, five hundred sixty-five".