2191180706506 has 16 divisors (see below), whose sum is σ = 3673021318848. Its totient is φ = 971698760800.

The previous prime is 2191180706471. The next prime is 2191180706527. The reversal of 2191180706506 is 6056070811912.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1214622550 + ... + 1214624353.

It is an arithmetic number, because the mean of its divisors is an integer number (229563832428).

Almost surely, 2^{2191180706506} is an apocalyptic number.

2191180706506 is a deficient number, since it is larger than the sum of its proper divisors (1481840612342).

2191180706506 is a wasteful number, since it uses less digits than its factorization.

2191180706506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429246957.

The product of its (nonzero) digits is 181440, while the sum is 46.

The spelling of 2191180706506 in words is "two trillion, one hundred ninety-one billion, one hundred eighty million, seven hundred six thousand, five hundred six".