11557538001 has 16 divisors (see below), whose sum is σ = 17137489600. Its totient is φ = 7698180384.

The previous prime is 11557537933. The next prime is 11557538033. The reversal of 11557538001 is 10083575511.

11557538001 is a `hidden beast` number, since 1 + 1 + 5 + 575 + 3 + 80 + 0 + 1 = 666.

It is not a de Polignac number, because 11557538001 - 2²¹ = 11555440849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11557538071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159091 + ... + 220056.

It is an arithmetic number, because the mean of its divisors is an integer number (1071093100).

Almost surely, 2^11557538001 is an apocalyptic number.

It is an amenable number.

11557538001 is a deficient number, since it is larger than the sum of its proper divisors (5579951599).

11557538001 is a wasteful number, since it uses less digits than its factorization.

11557538001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380285 (or 380279 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 36.

The spelling of 11557538001 in words is "eleven billion, five hundred fifty-seven million, five hundred thirty-eight thousand, one".