101665305240641 has 4 divisors (see below), whose sum is σ = 101815475559252. Its totient is φ = 101515134922032.

The previous prime is 101665305240623. The next prime is 101665305240661. The reversal of 101665305240641 is 146042503566101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53183050314241 + 48482254926400 = 7292671^2 + 6962920^2 .

It is a cyclic number.

It is not a de Polignac number, because 101665305240641 - 2¹⁴ = 101665305224257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101665305240592 and 101665305240601.

It is not an unprimeable number, because it can be changed into a prime (101665305240661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75085158290 + ... + 75085159643.

It is an arithmetic number, because the mean of its divisors is an integer number (25453868889813).

Almost surely, 2^{101665305240641} is an apocalyptic number.

It is an amenable number.

101665305240641 is a deficient number, since it is larger than the sum of its proper divisors (150170318611).

101665305240641 is an equidigital number, since it uses as much as digits as its factorization.

101665305240641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150170318610.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 101665305240641 in words is "one hundred one trillion, six hundred sixty-five billion, three hundred five million, two hundred forty thousand, six hundred forty-one".