2131194591646 has 8 divisors (see below), whose sum is σ = 3271135884984. Its totient is φ = 1040815963320.

The previous prime is 2131194591611. The next prime is 2131194591731. The reversal of 2131194591646 is 6461954911312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2131194591646² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2131194591593 and 2131194591602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12390666145 + ... + 12390666316.

It is an arithmetic number, because the mean of its divisors is an integer number (408891985623).

Almost surely, 2^{2131194591646} is an apocalyptic number.

2131194591646 is a deficient number, since it is larger than the sum of its proper divisors (1139941293338).

2131194591646 is a wasteful number, since it uses less digits than its factorization.

2131194591646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24781332506.

The product of its digits is 1399680, while the sum is 52.

The spelling of 2131194591646 in words is "two trillion, one hundred thirty-one billion, one hundred ninety-four million, five hundred ninety-one thousand, six hundred forty-six".