11655522421312 has 112 divisors (see below), whose sum is σ = 28859774444928. Its totient is φ = 4537378897920.

The previous prime is 11655522421247. The next prime is 11655522421321. The reversal of 11655522421312 is 21312422555611.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5025658 + ... + 6969094.

It is an arithmetic number, because the mean of its divisors is an integer number (257676557544).

Almost surely, 2^{11655522421312} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11655522421312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14429887222464).

11655522421312 is an abundant number, since it is smaller than the sum of its proper divisors (17204252023616).

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

11655522421312 is a wasteful number, since it uses less digits than its factorization.

11655522421312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944684 (or 1944674 counting only the distinct ones).

The product of its digits is 144000, while the sum is 40.

Adding to 11655522421312 its reverse (21312422555611), we get a palindrome (32967944976923).

The spelling of 11655522421312 in words is "eleven trillion, six hundred fifty-five billion, five hundred twenty-two million, four hundred twenty-one thousand, three hundred twelve".