1188815021460 has 960 divisors, whose sum is σ = 4472482646016. Its totient is φ = 260975001600.

The previous prime is 1188815021453. The next prime is 1188815021501. The reversal of 1188815021460 is 641205188811.

1188815021460 is a `hidden beast` number, since 1 + 1 + 8 + 8 + 81 + 502 + 1 + 4 + 60 = 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 (19) of ones.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 2601345552 + ... + 2601346008.

Almost surely, 2^{1188815021460} is an apocalyptic number.

1188815021460 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 1188815021460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2236241323008).

1188815021460 is an abundant number, since it is smaller than the sum of its proper divisors (3283667624556).

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

1188815021460 is a wasteful number, since it uses less digits than its factorization.

1188815021460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814 (or 803 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 45.

The spelling of 1188815021460 in words is "one trillion, one hundred eighty-eight billion, eight hundred fifteen million, twenty-one thousand, four hundred sixty".