11215805415 has 8 divisors (see below), whose sum is σ = 17945288688. Its totient is φ = 5981762880.

The previous prime is 11215805411. The next prime is 11215805417. The reversal of 11215805415 is 51450851211.

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

It is not a de Polignac number, because 11215805415 - 2² = 11215805411 is a prime.

It is a super-2 number, since 2×11215805415² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11215805411) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 373860166 + ... + 373860195.

It is an arithmetic number, because the mean of its divisors is an integer number (2243161086).

Almost surely, 2^11215805415 is an apocalyptic number.

11215805415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11215805415 is a deficient number, since it is larger than the sum of its proper divisors (6729483273).

11215805415 is an equidigital number, since it uses as much as digits as its factorization.

11215805415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747720369.

The product of its (nonzero) digits is 8000, while the sum is 33.

The spelling of 11215805415 in words is "eleven billion, two hundred fifteen million, eight hundred five thousand, four hundred fifteen".