180197999990 has 8 divisors (see below), whose sum is σ = 324356400000. Its totient is φ = 72079199992.

The previous prime is 180197999987. The next prime is 180197999999. The reversal of 180197999990 is 99999791081.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180197999999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9009899990 + ... + 9009900009.

It is an arithmetic number, because the mean of its divisors is an integer number (40544550000).

Almost surely, 2^180197999990 is an apocalyptic number.

180197999990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

180197999990 is a deficient number, since it is larger than the sum of its proper divisors (144158400010).

180197999990 is a wasteful number, since it uses less digits than its factorization.

180197999990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18019800006.

The product of its (nonzero) digits is 29760696, while the sum is 71.

The spelling of 180197999990 in words is "one hundred eighty billion, one hundred ninety-seven million, nine hundred ninety-nine thousand, nine hundred ninety".