11051661500 has 48 divisors (see below), whose sum is σ = 26331098976. Its totient is φ = 4018784000.

The previous prime is 11051661499. The next prime is 11051661521. The reversal of 11051661500 is 516615011.

It is a self number, because there is not a number n which added to its sum of digits gives 11051661500.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 999197 + ... + 1010196.

It is an arithmetic number, because the mean of its divisors is an integer number (548564562).

Almost surely, 2^11051661500 is an apocalyptic number.

11051661500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11051661500 is an abundant number, since it is smaller than the sum of its proper divisors (15279437476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11051661500 is a wasteful number, since it uses less digits than its factorization.

11051661500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009423 (or 2009411 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 26.

It can be divided in two parts, 1 and 1051661500, that added together give a palindrome (1051661501).

The spelling of 11051661500 in words is "eleven billion, fifty-one million, six hundred sixty-one thousand, five hundred".