11963747520 has 224 divisors, whose sum is σ = 43236123840. Its totient is φ = 3112427520.

The previous prime is 11963747473. The next prime is 11963747557. The reversal of 11963747520 is 2574736911.

11963747520 is a `hidden beast` number, since 1 + 1 + 9 + 637 + 4 + 7 + 5 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 337354 + ... + 371126.

It is an arithmetic number, because the mean of its divisors is an integer number (193018410).

Almost surely, 2^11963747520 is an apocalyptic number.

11963747520 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 11963747520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21618061920).

11963747520 is an abundant number, since it is smaller than the sum of its proper divisors (31272376320).

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

11963747520 is a wasteful number, since it uses less digits than its factorization.

11963747520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33840 (or 33824 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The spelling of 11963747520 in words is "eleven billion, nine hundred sixty-three million, seven hundred forty-seven thousand, five hundred twenty".