4181591916636 has 96 divisors (see below), whose sum is σ = 9832876720128. Its totient is φ = 1383073827840.

The previous prime is 4181591916629. The next prime is 4181591916721. The reversal of 4181591916636 is 6366191951814.

It is a self number, because there is not a number n which added to its sum of digits gives 4181591916636.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2469929406 + ... + 2469931098.

It is an arithmetic number, because the mean of its divisors is an integer number (102425799168).

Almost surely, 2^{4181591916636} is an apocalyptic number.

It is an amenable number.

4181591916636 is an abundant number, since it is smaller than the sum of its proper divisors (5651284803492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4181591916636 is a wasteful number, since it uses less digits than its factorization.

4181591916636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971 (or 3969 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 60.

The spelling of 4181591916636 in words is "four trillion, one hundred eighty-one billion, five hundred ninety-one million, nine hundred sixteen thousand, six hundred thirty-six".