1183988942640 has 480 divisors, whose sum is σ = 4733452039680. Its totient is φ = 269426829312.

The previous prime is 1183988942597. The next prime is 1183988942657. The reversal of 1183988942640 is 462498893811.

1183988942640 is a `hidden beast` number, since 1 + 1 + 8 + 3 + 98 + 89 + 426 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 30870996 + ... + 30909324.

It is an arithmetic number, because the mean of its divisors is an integer number (9861358416).

Almost surely, 2^{1183988942640} is an apocalyptic number.

1183988942640 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 1183988942640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2366726019840).

1183988942640 is an abundant number, since it is smaller than the sum of its proper divisors (3549463097040).

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

1183988942640 is a wasteful number, since it uses less digits than its factorization.

1183988942640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38591 (or 38573 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 63.

The spelling of 1183988942640 in words is "one trillion, one hundred eighty-three billion, nine hundred eighty-eight million, nine hundred forty-two thousand, six hundred forty".