16550115005565 has 24 divisors (see below), whose sum is σ = 28692618727968. Its totient is φ = 8824957935840.

The previous prime is 16550115005551. The next prime is 16550115005717. The reversal of 16550115005565 is 56550051105561.

It is not a de Polignac number, because 16550115005565 - 2¹⁷ = 16550114874493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 16550115005565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36649491 + ... + 37098320.

It is an arithmetic number, because the mean of its divisors is an integer number (1195525780332).

Almost surely, 2^{16550115005565} is an apocalyptic number.

16550115005565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16550115005565 is a deficient number, since it is larger than the sum of its proper divisors (12142503722403).

16550115005565 is a wasteful number, since it uses less digits than its factorization.

16550115005565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73752809 (or 73752806 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 45.

The spelling of 16550115005565 in words is "sixteen trillion, five hundred fifty billion, one hundred fifteen million, five thousand, five hundred sixty-five".