11810336505 has 32 divisors (see below), whose sum is σ = 20963819520. Its totient is φ = 5629164480.

The previous prime is 11810336501. The next prime is 11810336557. The reversal of 11810336505 is 50563301811.

It is not a de Polignac number, because 11810336505 - 2² = 11810336501 is a prime.

It is a super-2 number, since 2×11810336505² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (11810336501) 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, 596857 + ... + 616326.

It is an arithmetic number, because the mean of its divisors is an integer number (655119360).

Almost surely, 2^11810336505 is an apocalyptic number.

11810336505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11810336505 is a deficient number, since it is larger than the sum of its proper divisors (9153483015).

11810336505 is a wasteful number, since it uses less digits than its factorization.

11810336505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213261.

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 11810336505 in words is "eleven billion, eight hundred ten million, three hundred thirty-six thousand, five hundred five".