11554431531123 has 32 divisors (see below), whose sum is σ = 17238029659200. Its totient is φ = 6835253193216.

The previous prime is 11554431531113. The next prime is 11554431531127. The reversal of 11554431531123 is 32113513445511.

It is not a de Polignac number, because 11554431531123 - 2²² = 11554427336819 is a prime.

It is a super-2 number, since 2×11554431531123² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (11554431531127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22046940 + ... + 22564937.

It is an arithmetic number, because the mean of its divisors is an integer number (538688426850).

Almost surely, 2^{11554431531123} is an apocalyptic number.

11554431531123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11554431531123 is a deficient number, since it is larger than the sum of its proper divisors (5683598128077).

11554431531123 is a wasteful number, since it uses less digits than its factorization.

11554431531123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44612151.

The product of its digits is 108000, while the sum is 39.

Adding to 11554431531123 its reverse (32113513445511), we get a palindrome (43667944976634).

The spelling of 11554431531123 in words is "eleven trillion, five hundred fifty-four billion, four hundred thirty-one million, five hundred thirty-one thousand, one hundred twenty-three".