1181880371520 has 336 divisors, whose sum is σ = 4281450863040. Its totient is φ = 298418577408.

The previous prime is 1181880371509. The next prime is 1181880371521. The reversal of 1181880371520 is 251730881811.

1181880371520 is a `hidden beast` number, since 1 + 1 + 8 + 18 + 80 + 37 + 1 + 520 = 666.

It is a super-2 number, since 2×1181880371520² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181880371521) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 125687139 + ... + 125696541.

Almost surely, 2^{1181880371520} is an apocalyptic number.

1181880371520 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 1181880371520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2140725431520).

1181880371520 is an abundant number, since it is smaller than the sum of its proper divisors (3099570491520).

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

1181880371520 is a wasteful number, since it uses less digits than its factorization.

1181880371520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11742 (or 11729 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 45.

The spelling of 1181880371520 in words is "one trillion, one hundred eighty-one billion, eight hundred eighty million, three hundred seventy-one thousand, five hundred twenty".