181395900140 has 48 divisors (see below), whose sum is σ = 468838638912. Its totient is φ = 57408811776.

The previous prime is 181395900137. The next prime is 181395900157. The reversal of 181395900140 is 41009593181.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49832219 + ... + 49835858.

It is an arithmetic number, because the mean of its divisors is an integer number (9767471644).

Almost surely, 2^181395900140 is an apocalyptic number.

181395900140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181395900140 is an abundant number, since it is smaller than the sum of its proper divisors (287442738772).

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

181395900140 is a wasteful number, since it uses less digits than its factorization.

181395900140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99668106 (or 99668104 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 41.

The spelling of 181395900140 in words is "one hundred eighty-one billion, three hundred ninety-five million, nine hundred thousand, one hundred forty".