11965453019520 has 512 divisors, whose sum is σ = 51208800168960. Its totient is φ = 2295071539200.

The previous prime is 11965453019519. The next prime is 11965453019521. The reversal of 11965453019520 is 2591035456911.

It is an interprime number because it is at equal distance from previous prime (11965453019519) and next prime (11965453019521).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11965453019521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1190971 + ... + 5034810.

It is an arithmetic number, because the mean of its divisors is an integer number (100017187830).

Almost surely, 2^{11965453019520} is an apocalyptic number.

11965453019520 is a gapful number since it is divisible by the number (10) 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 11965453019520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25604400084480).

11965453019520 is an abundant number, since it is smaller than the sum of its proper divisors (39243347149440).

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

11965453019520 is a wasteful number, since it uses less digits than its factorization.

11965453019520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6225834 (or 6225822 counting only the distinct ones).

The product of its (nonzero) digits is 1458000, while the sum is 51.

The spelling of 11965453019520 in words is "eleven trillion, nine hundred sixty-five billion, four hundred fifty-three million, nineteen thousand, five hundred twenty".