16505245454 has 4 divisors (see below), whose sum is σ = 24757868184. Its totient is φ = 8252622726.

The previous prime is 16505245453. The next prime is 16505245459. The reversal of 16505245454 is 45454250561.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×16505245454² (a number of 21 digits) contains 22 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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4126311362 + ... + 4126311365.

It is an arithmetic number, because the mean of its divisors is an integer number (6189467046).

Almost surely, 2^16505245454 is an apocalyptic number.

16505245454 is a deficient number, since it is larger than the sum of its proper divisors (8252622730).

16505245454 is an equidigital number, since it uses as much as digits as its factorization.

16505245454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8252622729.

The product of its (nonzero) digits is 480000, while the sum is 41.

The spelling of 16505245454 in words is "sixteen billion, five hundred five million, two hundred forty-five thousand, four hundred fifty-four".