11534815978893 has 12 divisors (see below), whose sum is σ = 16747729362780. Its totient is φ = 7650033394176.

The previous prime is 11534815978891. The next prime is 11534815978943. The reversal of 11534815978893 is 39887951843511.

It is a happy number.

11534815978893 is a `hidden beast` number, since 1 + 1 + 5 + 3 + 481 + 59 + 7 + 8 + 8 + 93 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7676019336969 + 3858796641924 = 2770563^2 + 1964382^2 .

It is not a de Polignac number, because 11534815978893 - 2¹ = 11534815978891 is a prime.

It is a hoax number, since the sum of its digits (72) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11534815978891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3320325258 + ... + 3320328731.

It is an arithmetic number, because the mean of its divisors is an integer number (1395644113565).

Almost surely, 2^{11534815978893} is an apocalyptic number.

It is an amenable number.

11534815978893 is a deficient number, since it is larger than the sum of its proper divisors (5212913383887).

11534815978893 is a wasteful number, since it uses less digits than its factorization.

11534815978893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6640654188 (or 6640654185 counting only the distinct ones).

The product of its digits is 261273600, while the sum is 72.

The spelling of 11534815978893 in words is "eleven trillion, five hundred thirty-four billion, eight hundred fifteen million, nine hundred seventy-eight thousand, eight hundred ninety-three".