11000051505 has 20 divisors (see below), whose sum is σ = 19718611572. Its totient is φ = 5866693920.

The previous prime is 11000051483. The next prime is 11000051591. The reversal of 11000051505 is 50515000011.

11000051505 is a `hidden beast` number, since 110 + 0 + 0 + 0 + 51 + 505 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1974291489 + 9025760016 = 44433^2 + 95004^2 .

It is not a de Polignac number, because 11000051505 - 2¹⁴ = 11000035121 is a prime.

It is a super-2 number, since 2×11000051505² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13579906 + ... + 13580715.

Almost surely, 2^11000051505 is an apocalyptic number.

11000051505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11000051505 is a deficient number, since it is larger than the sum of its proper divisors (8718560067).

11000051505 is an equidigital number, since it uses as much as digits as its factorization.

11000051505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27160638 (or 27160629 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 18.

Adding to 11000051505 its reverse (50515000011), we get a palindrome (61515051516).

The spelling of 11000051505 in words is "eleven billion, fifty-one thousand, five hundred five".