11631297888 has 72 divisors (see below), whose sum is σ = 37801724688. Its totient is φ = 3323227392.

The previous prime is 11631297883. The next prime is 11631297889. The reversal of 11631297888 is 88879213611.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11631297883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2882731 + ... + 2886762.

It is an arithmetic number, because the mean of its divisors is an integer number (525023954).

Almost surely, 2^11631297888 is an apocalyptic number.

11631297888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11631297888 is an abundant number, since it is smaller than the sum of its proper divisors (26170426800).

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

11631297888 is a wasteful number, since it uses less digits than its factorization.

11631297888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5769516 (or 5769505 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The spelling of 11631297888 in words is "eleven billion, six hundred thirty-one million, two hundred ninety-seven thousand, eight hundred eighty-eight".