209992146001 has 9 divisors (see below), whose sum is σ = 230823354153. Its totient is φ = 190897368420.

The previous prime is 209992145999. The next prime is 209992146053. The reversal of 209992146001 is 100641299902.

The square root of 209992146001 is 458249.

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

It is not a de Polignac number, because 209992146001 - 2¹ = 209992145999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209992146071) 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, 5019910 + ... + 5061568.

Almost surely, 2^209992146001 is an apocalyptic number.

209992146001 is the 458249-th square number.

209992146001 is the 229125-th centered octagonal number.

It is an amenable number.

209992146001 is a deficient number, since it is larger than the sum of its proper divisors (20831208152).

209992146001 is an frugal number, since it uses more digits than its factorization.

209992146001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83340 (or 41670 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 209992146001 in words is "two hundred nine billion, nine hundred ninety-two million, one hundred forty-six thousand, one".