11415811087 has 4 divisors (see below), whose sum is σ = 11416092120. Its totient is φ = 11415530056.

The previous prime is 11415811037. The next prime is 11415811091. The reversal of 11415811087 is 78011851411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78011851411 = 13 ⋅6000911647.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11415811087 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 (11415811037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66637 + ... + 165142.

It is an arithmetic number, because the mean of its divisors is an integer number (2854023030).

Almost surely, 2^11415811087 is an apocalyptic number.

11415811087 is a deficient number, since it is larger than the sum of its proper divisors (281033).

11415811087 is an equidigital number, since it uses as much as digits as its factorization.

11415811087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281032.

The product of its (nonzero) digits is 8960, while the sum is 37.

The spelling of 11415811087 in words is "eleven billion, four hundred fifteen million, eight hundred eleven thousand, eighty-seven".