3487131647991 has 12 divisors (see below), whose sum is σ = 5154106725768. Its totient is φ = 2270690375184.

The previous prime is 3487131647953. The next prime is 3487131647999. The reversal of 3487131647991 is 1997461317843.

3487131647991 is a `hidden beast` number, since 3 + 4 + 8 + 71 + 3 + 1 + 6 + 479 + 91 = 666.

It is not a de Polignac number, because 3487131647991 - 2¹⁸ = 3487131385847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3487131647999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4505337660 + ... + 4505338433.

It is an arithmetic number, because the mean of its divisors is an integer number (429508893814).

Almost surely, 2^{3487131647991} is an apocalyptic number.

3487131647991 is a deficient number, since it is larger than the sum of its proper divisors (1666975077777).

3487131647991 is a wasteful number, since it uses less digits than its factorization.

3487131647991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9010676142 (or 9010676139 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The spelling of 3487131647991 in words is "three trillion, four hundred eighty-seven billion, one hundred thirty-one million, six hundred forty-seven thousand, nine hundred ninety-one".