10271217661 has 4 divisors (see below), whose sum is σ = 10510083232. Its totient is φ = 10032352092.

The previous prime is 10271217643. The next prime is 10271217683. The reversal of 10271217661 is 16671217201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10271217661 - 2¹⁷ = 10271086589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10271217611) 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, 119432721 + ... + 119432806.

It is an arithmetic number, because the mean of its divisors is an integer number (2627520808).

Almost surely, 2^10271217661 is an apocalyptic number.

It is an amenable number.

10271217661 is a deficient number, since it is larger than the sum of its proper divisors (238865571).

10271217661 is an equidigital number, since it uses as much as digits as its factorization.

10271217661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238865570.

The product of its (nonzero) digits is 7056, while the sum is 34.

The spelling of 10271217661 in words is "ten billion, two hundred seventy-one million, two hundred seventeen thousand, six hundred sixty-one".