190009681801 has 9 divisors (see below), whose sum is σ = 190708370901. Its totient is φ = 189313547904.

The previous prime is 190009681783. The next prime is 190009681831. The reversal of 190009681801 is 108186900091.

It is a happy number.

The square root of 190009681801 is 435901.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 4369342201 + 185640339600 = 66101^2 + 430860^2 .

It is not a de Polignac number, because 190009681801 - 2⁹ = 190009681289 is a prime.

It is a super-2 number, since 2×190009681801² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190009681831) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 152128825 + ... + 152130073.

It is an arithmetic number, because the mean of its divisors is an integer number (21189818989).

Almost surely, 2^190009681801 is an apocalyptic number.

190009681801 is the 435901-st square number.

190009681801 is the 217951-st centered octagonal number.

It is an amenable number.

190009681801 is a deficient number, since it is larger than the sum of its proper divisors (698689100).

190009681801 is an frugal number, since it uses more digits than its factorization.

190009681801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3196 (or 1598 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 43.

The spelling of 190009681801 in words is "one hundred ninety billion, nine million, six hundred eighty-one thousand, eight hundred one".