11665307542128 has 40 divisors (see below), whose sum is σ = 30150363336576. Its totient is φ = 3886502232000.

The previous prime is 11665307542123. The next prime is 11665307542139. The reversal of 11665307542128 is 82124570356611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11665307542123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60327948 + ... + 60521003.

Almost surely, 2^{11665307542128} is an apocalyptic number.

It is an amenable number.

11665307542128 is an abundant number, since it is smaller than the sum of its proper divisors (18485055794448).

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

11665307542128 is a wasteful number, since it uses less digits than its factorization.

11665307542128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120850973 (or 120850967 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 51.

Adding to 11665307542128 its reverse (82124570356611), we get a palindrome (93789877898739).

The spelling of 11665307542128 in words is "eleven trillion, six hundred sixty-five billion, three hundred seven million, five hundred forty-two thousand, one hundred twenty-eight".