11915804330640 has 400 divisors, whose sum is σ = 47570974691328. Its totient is φ = 2707867210752.

The previous prime is 11915804330569. The next prime is 11915804330701. The reversal of 11915804330640 is 4603340851911.

11915804330640 is a `hidden beast` number, since 1 + 1 + 9 + 1 + 580 + 4 + 3 + 3 + 0 + 64 + 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 79 ways as a sum of consecutive naturals, for example, 7088049 + ... + 8606511.

Almost surely, 2^{11915804330640} is an apocalyptic number.

11915804330640 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 11915804330640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23785487345664).

11915804330640 is an abundant number, since it is smaller than the sum of its proper divisors (35655170360688).

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

11915804330640 is a wasteful number, since it uses less digits than its factorization.

11915804330640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518668 (or 1518653 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 11915804330640 in words is "eleven trillion, nine hundred fifteen billion, eight hundred four million, three hundred thirty thousand, six hundred forty".