1181860009920 has 168 divisors, whose sum is σ = 4215665751024. Its totient is φ = 315162648576.

The previous prime is 1181860009909. The next prime is 1181860009949. The reversal of 1181860009920 is 299000681811.

1181860009920 is a `hidden beast` number, since 1 + 1 + 8 + 18 + 600 + 0 + 9 + 9 + 20 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7521649 + ... + 7677168.

It is an arithmetic number, because the mean of its divisors is an integer number (25093248518).

Almost surely, 2^{1181860009920} is an apocalyptic number.

1181860009920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1181860009920 is an abundant number, since it is smaller than the sum of its proper divisors (3033805741104).

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

1181860009920 is an equidigital number, since it uses as much as digits as its factorization.

1181860009920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15198849 (or 15198827 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 45.

The spelling of 1181860009920 in words is "one trillion, one hundred eighty-one billion, eight hundred sixty million, nine thousand, nine hundred twenty".