11245655565 has 24 divisors (see below), whose sum is σ = 19767017088. Its totient is φ = 5913206880.

The previous prime is 11245655543. The next prime is 11245655579. The reversal of 11245655565 is 56555654211.

It is a happy number.

11245655565 is a `hidden beast` number, since 1 + 1 + 24 + 5 + 65 + 5 + 565 = 666.

It is not a de Polignac number, because 11245655565 - 2⁶ = 11245655501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11245655565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1756689 + ... + 1763078.

It is an arithmetic number, because the mean of its divisors is an integer number (823625712).

Almost surely, 2^11245655565 is an apocalyptic number.

11245655565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11245655565 is a deficient number, since it is larger than the sum of its proper divisors (8521361523).

11245655565 is a wasteful number, since it uses less digits than its factorization.

11245655565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3519849 (or 3519846 counting only the distinct ones).

The product of its digits is 900000, while the sum is 45.

The spelling of 11245655565 in words is "eleven billion, two hundred forty-five million, six hundred fifty-five thousand, five hundred sixty-five".