11608123081 has 3 divisors (see below), whose sum is σ = 11608230823. Its totient is φ = 11608015340.

The previous prime is 11608123067. The next prime is 11608123097. The reversal of 11608123081 is 18032180611.

The square root of 11608123081 is 107741.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 10714113081 + 894010000 = 103509^2 + 29900^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11608123081 is a prime.

It is a super-2 number, since 2×11608123081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11608123031) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 53871 + ... + 161611.

Almost surely, 2^11608123081 is an apocalyptic number.

11608123081 is the 107741-st square number.

11608123081 is the 53871-st centered octagonal number.

It is an amenable number.

11608123081 is a deficient number, since it is larger than the sum of its proper divisors (107742).

11608123081 is an frugal number, since it uses more digits than its factorization.

11608123081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215482 (or 107741 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

Multiplying 11608123081 by its product of nonzero digits (2304), we get a square (26745115578624 = 5171568²).

It can be divided in two parts, 11608 and 123081, that added together give a square (134689 = 367²).

The spelling of 11608123081 in words is "eleven billion, six hundred eight million, one hundred twenty-three thousand, eighty-one".