16505185227355 has 8 divisors (see below), whose sum is σ = 21606787934064. Its totient is φ = 12003771074400.

The previous prime is 16505185227341. The next prime is 16505185227397. The reversal of 16505185227355 is 55372258150561.

It is a happy number.

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

It is not a de Polignac number, because 16505185227355 - 2¹⁹ = 16505184703067 is a prime.

It is a super-2 number, since 2×16505185227355² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55), and also a Moran number because the ratio is a prime number: 300094276861 = 16505185227355 / (1 + 6 + 5 + 0 + 5 + 1 + 8 + 5 + 2 + 2 + 7 + 3 + 5 + 5).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16505185227296 and 16505185227305.

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, 150047138376 + ... + 150047138485.

It is an arithmetic number, because the mean of its divisors is an integer number (2700848491758).

Almost surely, 2^{16505185227355} is an apocalyptic number.

16505185227355 is a deficient number, since it is larger than the sum of its proper divisors (5101602706709).

16505185227355 is a wasteful number, since it uses less digits than its factorization.

16505185227355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300094276877.

The product of its (nonzero) digits is 12600000, while the sum is 55.

The spelling of 16505185227355 in words is "sixteen trillion, five hundred five billion, one hundred eighty-five million, two hundred twenty-seven thousand, three hundred fifty-five".