11771011530 has 160 divisors (see below), whose sum is σ = 33589987200. Its totient is φ = 2951296128.

The previous prime is 11771011529. The next prime is 11771011543. The reversal of 11771011530 is 3511017711.

11771011530 is a `hidden beast` number, since 117 + 7 + 1 + 0 + 11 + 530 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11771011494 and 11771011503.

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 79 ways as a sum of consecutive naturals, for example, 1093816 + ... + 1104524.

It is an arithmetic number, because the mean of its divisors is an integer number (209937420).

Almost surely, 2^11771011530 is an apocalyptic number.

11771011530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11771011530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16794993600).

11771011530 is an abundant number, since it is smaller than the sum of its proper divisors (21818975670).

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

11771011530 is a wasteful number, since it uses less digits than its factorization.

11771011530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10810 (or 10801 counting only the distinct ones).

The product of its (nonzero) digits is 735, while the sum is 27.

The spelling of 11771011530 in words is "eleven billion, seven hundred seventy-one million, eleven thousand, five hundred thirty".