11611580238 has 48 divisors (see below), whose sum is σ = 26546083200. Its totient is φ = 3658018320.

The previous prime is 11611580221. The next prime is 11611580269. The reversal of 11611580238 is 83208511611.

11611580238 is a `hidden beast` number, since 1 + 1 + 611 + 5 + 8 + 0 + 2 + 38 = 666.

11611580238 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102783 + ... + 183813.

It is an arithmetic number, because the mean of its divisors is an integer number (553043400).

Almost surely, 2^11611580238 is an apocalyptic number.

11611580238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11611580238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13273041600).

11611580238 is an abundant number, since it is smaller than the sum of its proper divisors (14934502962).

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

11611580238 is a wasteful number, since it uses less digits than its factorization.

11611580238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81477 (or 81474 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The spelling of 11611580238 in words is "eleven billion, six hundred eleven million, five hundred eighty thousand, two hundred thirty-eight".