11661262440 has 32 divisors (see below), whose sum is σ = 34983787680. Its totient is φ = 3109669952.

The previous prime is 11661262439. The next prime is 11661262441. The reversal of 11661262440 is 4426216611.

11661262440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11661262439) and next prime (11661262441).

It is not an unprimeable number, because it can be changed into a prime (11661262441) 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 7 ways as a sum of consecutive naturals, for example, 48588474 + ... + 48588713.

It is an arithmetic number, because the mean of its divisors is an integer number (1093243365).

Almost surely, 2^11661262440 is an apocalyptic number.

11661262440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11661262440 is an abundant number, since it is smaller than the sum of its proper divisors (23322525240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11661262440 is a wasteful number, since it uses less digits than its factorization.

11661262440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97177201 (or 97177197 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 11661262440 in words is "eleven billion, six hundred sixty-one million, two hundred sixty-two thousand, four hundred forty".