11740523561 has 24 divisors (see below), whose sum is σ = 13482224280. Its totient is φ = 10161119232.

The previous prime is 11740523549. The next prime is 11740523569. The reversal of 11740523561 is 16532504711.

It is a happy number.

11740523561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 4128833536 + 7611690025 = 64256^2 + 87245^2 .

It is not a de Polignac number, because 11740523561 - 2¹⁰ = 11740522537 is a prime.

It is a super-2 number, since 2×11740523561² (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 (11740523569) by changing a digit.

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, 1004825 + ... + 1016441.

It is an arithmetic number, because the mean of its divisors is an integer number (561759345).

Almost surely, 2^11740523561 is an apocalyptic number.

It is an amenable number.

11740523561 is a deficient number, since it is larger than the sum of its proper divisors (1741700719).

11740523561 is a wasteful number, since it uses less digits than its factorization.

11740523561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11933 (or 11916 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 11740523561 in words is "eleven billion, seven hundred forty million, five hundred twenty-three thousand, five hundred sixty-one".