181999149002 has 32 divisors (see below), whose sum is σ = 298589639040. Its totient is φ = 82512414720.

The previous prime is 181999148977. The next prime is 181999149019. The reversal of 181999149002 is 200941999181.

It is a super-4 number, since 4×181999149002⁴ (a number of 46 digits) contains 4444 as substring.

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, 23112938 + ... + 23120810.

It is an arithmetic number, because the mean of its divisors is an integer number (9330926220).

Almost surely, 2^181999149002 is an apocalyptic number.

181999149002 is a deficient number, since it is larger than the sum of its proper divisors (116590490038).

181999149002 is a wasteful number, since it uses less digits than its factorization.

181999149002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10478.

The product of its (nonzero) digits is 419904, while the sum is 53.

The spelling of 181999149002 in words is "one hundred eighty-one billion, nine hundred ninety-nine million, one hundred forty-nine thousand, two".