11556535461 has 32 divisors (see below), whose sum is σ = 16052305920. Its totient is φ = 7391217600.

The previous prime is 11556535447. The next prime is 11556535481. The reversal of 11556535461 is 16453565511.

11556535461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11556535461 - 2⁹ = 11556534949 is a prime.

It is a super-2 number, since 2×11556535461² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11556535421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1195116 + ... + 1204746.

It is an arithmetic number, because the mean of its divisors is an integer number (501634560).

Almost surely, 2^11556535461 is an apocalyptic number.

It is an amenable number.

11556535461 is a deficient number, since it is larger than the sum of its proper divisors (4495770459).

11556535461 is an equidigital number, since it uses as much as digits as its factorization.

11556535461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9857.

The product of its digits is 270000, while the sum is 42.

The spelling of 11556535461 in words is "eleven billion, five hundred fifty-six million, five hundred thirty-five thousand, four hundred sixty-one".