2051605061686 has 16 divisors (see below), whose sum is σ = 3152641660560. Its totient is φ = 1000727291520.

The previous prime is 2051605061663. The next prime is 2051605061717. The reversal of 2051605061686 is 6861605061502.

It is a congruent number.

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, 807085 + ... + 2180503.

It is an arithmetic number, because the mean of its divisors is an integer number (197040103785).

Almost surely, 2^{2051605061686} is an apocalyptic number.

2051605061686 is a deficient number, since it is larger than the sum of its proper divisors (1101036598874).

2051605061686 is a wasteful number, since it uses less digits than its factorization.

2051605061686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391679.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 2051605061686 in words is "two trillion, fifty-one billion, six hundred five million, sixty-one thousand, six hundred eighty-six".