11561389357 has 16 divisors (see below), whose sum is σ = 13445380480. Its totient is φ = 9736962048.

The previous prime is 11561389351. The next prime is 11561389391. The reversal of 11561389357 is 75398316511.

It is a happy number.

11561389357 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11561389357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11561389357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11561389351) 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 15 ways as a sum of consecutive naturals, for example, 33133 + ... + 155629.

It is an arithmetic number, because the mean of its divisors is an integer number (840336280).

Almost surely, 2^11561389357 is an apocalyptic number.

It is an amenable number.

11561389357 is a deficient number, since it is larger than the sum of its proper divisors (1883991123).

11561389357 is a wasteful number, since it uses less digits than its factorization.

11561389357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122740.

The product of its digits is 680400, while the sum is 49.

The spelling of 11561389357 in words is "eleven billion, five hundred sixty-one million, three hundred eighty-nine thousand, three hundred fifty-seven".