11555231664031 has 16 divisors (see below), whose sum is σ = 13157055555840. Its totient is φ = 10045526518720.

The previous prime is 11555231663957. The next prime is 11555231664043. The reversal of 11555231664031 is 13046613255511.

It is not a de Polignac number, because 11555231664031 - 2⁴¹ = 9356208408479 is a prime.

It is a super-2 number, since 2×11555231664031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11555231664631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4665310 + ... + 6698923.

It is an arithmetic number, because the mean of its divisors is an integer number (822315972240).

Almost surely, 2^{11555231664031} is an apocalyptic number.

11555231664031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11555231664031 is a deficient number, since it is larger than the sum of its proper divisors (1601823891809).

11555231664031 is a wasteful number, since it uses less digits than its factorization.

11555231664031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11368286.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 11555231664031 in words is "eleven trillion, five hundred fifty-five billion, two hundred thirty-one million, six hundred sixty-four thousand, thirty-one".