15663265445 has 4 divisors (see below), whose sum is σ = 18795918540. Its totient is φ = 12530612352.

The previous prime is 15663265421. The next prime is 15663265451. The reversal of 15663265445 is 54456236651.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6621727876 + 9041537569 = 81374^2 + 95087^2 .

It is a cyclic number.

It is not a de Polignac number, because 15663265445 - 2¹⁴ = 15663249061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15663265445.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1566326540 + ... + 1566326549.

It is an arithmetic number, because the mean of its divisors is an integer number (4698979635).

Almost surely, 2^15663265445 is an apocalyptic number.

It is an amenable number.

15663265445 is a deficient number, since it is larger than the sum of its proper divisors (3132653095).

15663265445 is an equidigital number, since it uses as much as digits as its factorization.

15663265445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3132653094.

The product of its digits is 2592000, while the sum is 47.

The spelling of 15663265445 in words is "fifteen billion, six hundred sixty-three million, two hundred sixty-five thousand, four hundred forty-five".