181033981007 has 8 divisors (see below), whose sum is σ = 197494757712. Its totient is φ = 164573728000.

The previous prime is 181033980949. The next prime is 181033981021. The reversal of 181033981007 is 700189330181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 181033981007 - 2¹⁰ = 181033979983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181033981207) 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, 1074293 + ... + 1231329.

It is an arithmetic number, because the mean of its divisors is an integer number (24686844714).

Almost surely, 2^181033981007 is an apocalyptic number.

181033981007 is a deficient number, since it is larger than the sum of its proper divisors (16460776705).

181033981007 is a wasteful number, since it uses less digits than its factorization.

181033981007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261849.

The product of its (nonzero) digits is 36288, while the sum is 41.

The spelling of 181033981007 in words is "one hundred eighty-one billion, thirty-three million, nine hundred eighty-one thousand, seven".