201662171015 has 8 divisors (see below), whose sum is σ = 242335927680. Its totient is φ = 161102188512.

The previous prime is 201662171003. The next prime is 201662171027. The reversal of 201662171015 is 510171266102.

It is an interprime number because it is at equal distance from previous prime (201662171003) and next prime (201662171027).

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

It is a cyclic number.

It is not a de Polignac number, because 201662171015 - 2¹⁰ = 201662169991 is a prime.

It is a super-2 number, since 2×201662171015² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28439639 + ... + 28446728.

It is an arithmetic number, because the mean of its divisors is an integer number (30291990960).

Almost surely, 2^201662171015 is an apocalyptic number.

201662171015 is a deficient number, since it is larger than the sum of its proper divisors (40673756665).

201662171015 is an equidigital number, since it uses as much as digits as its factorization.

201662171015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56887081.

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 201662171015 in words is "two hundred one billion, six hundred sixty-two million, one hundred seventy-one thousand, fifteen".