4191516201601 has 4 divisors (see below), whose sum is σ = 4234727708932. Its totient is φ = 4148304694272.

The previous prime is 4191516201547. The next prime is 4191516201623. The reversal of 4191516201601 is 1061026151914.

It is a happy number.

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 660871443600 + 3530644758001 = 812940^2 + 1879001^2 .

It is not a de Polignac number, because 4191516201601 - 2²³ = 4191507812993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4191516201641) 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, 21605753520 + ... + 21605753713.

It is an arithmetic number, because the mean of its divisors is an integer number (1058681927233).

Almost surely, 2^{4191516201601} is an apocalyptic number.

It is an amenable number.

4191516201601 is a deficient number, since it is larger than the sum of its proper divisors (43211507331).

4191516201601 is an equidigital number, since it uses as much as digits as its factorization.

4191516201601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43211507330.

The product of its (nonzero) digits is 12960, while the sum is 37.

The spelling of 4191516201601 in words is "four trillion, one hundred ninety-one billion, five hundred sixteen million, two hundred one thousand, six hundred one".