206172071601 has 8 divisors (see below), whose sum is σ = 276542180544. Its totient is φ = 136625005200.

The previous prime is 206172071579. The next prime is 206172071603. The reversal of 206172071601 is 106170271602.

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

It is not a de Polignac number, because 206172071601 - 2¹⁹ = 206171547313 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (206172071603) 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, 205760050 + ... + 205761051.

It is an arithmetic number, because the mean of its divisors is an integer number (34567772568).

Almost surely, 2^206172071601 is an apocalyptic number.

It is an amenable number.

206172071601 is a deficient number, since it is larger than the sum of its proper divisors (70370108943).

206172071601 is a wasteful number, since it uses less digits than its factorization.

206172071601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411521271.

The product of its (nonzero) digits is 7056, while the sum is 33.

The spelling of 206172071601 in words is "two hundred six billion, one hundred seventy-two million, seventy-one thousand, six hundred one".