11557923867 has 24 divisors (see below), whose sum is σ = 19909304064. Its totient is φ = 6317373744.

The previous prime is 11557923863. The next prime is 11557923893. The reversal of 11557923867 is 76832975511.

11557923867 is a `hidden beast` number, since 1 + 1 + 5 + 579 + 2 + 3 + 8 + 67 = 666.

It is not a de Polignac number, because 11557923867 - 2² = 11557923863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11557923863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3986793 + ... + 3989690.

It is an arithmetic number, because the mean of its divisors is an integer number (829554336).

Almost surely, 2^11557923867 is an apocalyptic number.

11557923867 is a deficient number, since it is larger than the sum of its proper divisors (8351380197).

11557923867 is a wasteful number, since it uses less digits than its factorization.

11557923867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7976519 (or 7976516 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 54.

The spelling of 11557923867 in words is "eleven billion, five hundred fifty-seven million, nine hundred twenty-three thousand, eight hundred sixty-seven".