11161500644 has 12 divisors (see below), whose sum is σ = 22323001344. Its totient is φ = 4783500264.

The previous prime is 11161500641. The next prime is 11161500653. The reversal of 11161500644 is 44600516111.

It is a happy number.

11161500644 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (11161500641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199312484 + ... + 199312539.

It is an arithmetic number, because the mean of its divisors is an integer number (1860250112).

Almost surely, 2^11161500644 is an apocalyptic number.

11161500644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

11161500644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11161500644 is a wasteful number, since it uses less digits than its factorization.

11161500644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398625034 (or 398625032 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The spelling of 11161500644 in words is "eleven billion, one hundred sixty-one million, five hundred thousand, six hundred forty-four".