11564861455 has 8 divisors (see below), whose sum is σ = 15860381472. Its totient is φ = 7930190688.

The previous prime is 11564861453. The next prime is 11564861467. The reversal of 11564861455 is 55416846511.

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

It is not a de Polignac number, because 11564861455 - 2¹ = 11564861453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11564861453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165212272 + ... + 165212341.

It is an arithmetic number, because the mean of its divisors is an integer number (1982547684).

Almost surely, 2^11564861455 is an apocalyptic number.

11564861455 is a deficient number, since it is larger than the sum of its proper divisors (4295520017).

11564861455 is an equidigital number, since it uses as much as digits as its factorization.

11564861455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330424625.

The product of its digits is 576000, while the sum is 46.

The spelling of 11564861455 in words is "eleven billion, five hundred sixty-four million, eight hundred sixty-one thousand, four hundred fifty-five".