11563995 has 32 divisors (see below), whose sum is σ = 19828800. Its totient is φ = 5734400.

The previous prime is 11563987. The next prime is 11563997. The reversal of 11563995 is 59936511.

It is not a de Polignac number, because 11563995 - 2³ = 11563987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11563997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25531 + ... + 25979.

It is an arithmetic number, because the mean of its divisors is an integer number (619650).

Almost surely, 2^11563995 is an apocalyptic number.

11563995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11563995 is a deficient number, since it is larger than the sum of its proper divisors (8264805).

11563995 is a wasteful number, since it uses less digits than its factorization.

11563995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575.

The product of its digits is 36450, while the sum is 39.

The square root of 11563995 is about 3400.5874492505. The cubic root of 11563995 is about 226.1357878215.

It can be divided in two parts, 1156 and 3995, that added together give a triangular number (5151 = T₁₀₁).

The spelling of 11563995 in words is "eleven million, five hundred sixty-three thousand, nine hundred ninety-five".