181210791340 has 24 divisors (see below), whose sum is σ = 380592772560. Its totient is φ = 72474771648.

The previous prime is 181210791329. The next prime is 181210791347. The reversal of 181210791340 is 43197012181.

It is a self number, because there is not a number n which added to its sum of digits gives 181210791340.

It is not an unprimeable number, because it can be changed into a prime (181210791347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439875 + ... + 745594.

It is an arithmetic number, because the mean of its divisors is an integer number (15858032190).

Almost surely, 2^181210791340 is an apocalyptic number.

181210791340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181210791340 is an abundant number, since it is smaller than the sum of its proper divisors (199381981220).

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

181210791340 is a wasteful number, since it uses less digits than its factorization.

181210791340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193121 (or 1193119 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 37.

The spelling of 181210791340 in words is "one hundred eighty-one billion, two hundred ten million, seven hundred ninety-one thousand, three hundred forty".