16505245455 has 64 divisors (see below), whose sum is σ = 28121264640. Its totient is φ = 8250729984.

The previous prime is 16505245453. The next prime is 16505245459. The reversal of 16505245455 is 55454250561.

It is not a de Polignac number, because 16505245455 - 2¹ = 16505245453 is a prime.

It is a super-4 number, since 4×16505245455⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16505245453) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9446892 + ... + 9448638.

It is an arithmetic number, because the mean of its divisors is an integer number (439394760).

Almost surely, 2^16505245455 is an apocalyptic number.

16505245455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16505245455 is a deficient number, since it is larger than the sum of its proper divisors (11616019185).

16505245455 is a wasteful number, since it uses less digits than its factorization.

16505245455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408.

The product of its (nonzero) digits is 600000, while the sum is 42.

The spelling of 16505245455 in words is "sixteen billion, five hundred five million, two hundred forty-five thousand, four hundred fifty-five".