1813866948180 has 144 divisors (see below), whose sum is σ = 6564470955840. Its totient is φ = 414598153536.

The previous prime is 1813866948163. The next prime is 1813866948203. The reversal of 1813866948180 is 818496683181.

1813866948180 is a `hidden beast` number, since 1 + 8 + 13 + 8 + 6 + 69 + 481 + 80 = 666.

It is a super-2 number, since 2×1813866948180² (a number of 25 digits) contains 22 as substring.

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

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 47 ways as a sum of consecutive naturals, for example, 34249182 + ... + 34302101.

It is an arithmetic number, because the mean of its divisors is an integer number (45586603860).

Almost surely, 2^{1813866948180} is an apocalyptic number.

1813866948180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1813866948180 is an abundant number, since it is smaller than the sum of its proper divisors (4750604007660).

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

1813866948180 is a wasteful number, since it uses less digits than its factorization.

1813866948180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68551315 (or 68551300 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 63.

The spelling of 1813866948180 in words is "one trillion, eight hundred thirteen billion, eight hundred sixty-six million, nine hundred forty-eight thousand, one hundred eighty".