181127828640 has 192 divisors, whose sum is σ = 639243964800. Its totient is φ = 42722979840.

The previous prime is 181127828633. The next prime is 181127828641. The reversal of 181127828640 is 46828721181.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 181127828640.

It is not an unprimeable number, because it can be changed into a prime (181127828641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 268215 + ... + 658934.

It is an arithmetic number, because the mean of its divisors is an integer number (3329395650).

Almost surely, 2^181127828640 is an apocalyptic number.

181127828640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181127828640 is an abundant number, since it is smaller than the sum of its proper divisors (458116136160).

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

181127828640 is a wasteful number, since it uses less digits than its factorization.

181127828640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927215 (or 927207 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 48.

The spelling of 181127828640 in words is "one hundred eighty-one billion, one hundred twenty-seven million, eight hundred twenty-eight thousand, six hundred forty".