11641431552 has 80 divisors (see below), whose sum is σ = 31129055232. Its totient is φ = 3866019840.

The previous prime is 11641431511. The next prime is 11641431553. The reversal of 11641431552 is 25513414611.

It is a super-2 number, since 2×11641431552² (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 (11641431553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402273 + ... + 430239.

Almost surely, 2^11641431552 is an apocalyptic number.

11641431552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11641431552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15564527616).

11641431552 is an abundant number, since it is smaller than the sum of its proper divisors (19487623680).

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

11641431552 is an equidigital number, since it uses as much as digits as its factorization.

11641431552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28259 (or 28243 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The spelling of 11641431552 in words is "eleven billion, six hundred forty-one million, four hundred thirty-one thousand, five hundred fifty-two".