391606121606193 has 64 divisors (see below), whose sum is σ = 661602538195200. Its totient is φ = 226790034693120.

The previous prime is 391606121606177. The next prime is 391606121606197.

391606121606193 is a `hidden beast` number, since 3 + 9 + 1 + 6 + 0 + 6 + 1 + 2 + 16 + 0 + 619 + 3 = 666.

391606121606193 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 391606121606193 - 2⁴ = 391606121606177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (391606121606197) 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 63 ways as a sum of consecutive naturals, for example, 56822778 + ... + 63340668.

It is an arithmetic number, because the mean of its divisors is an integer number (10337539659300).

Almost surely, 2^{391606121606193} is an apocalyptic number.

It is an amenable number.

391606121606193 is a deficient number, since it is larger than the sum of its proper divisors (269996416589007).

391606121606193 is a wasteful number, since it uses less digits than its factorization.

391606121606193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6527999 (or 6527993 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 54.

The spelling of 391606121606193 in words is "three hundred ninety-one trillion, six hundred six billion, one hundred twenty-one million, six hundred six thousand, one hundred ninety-three".