161440316806 has 32 divisors (see below), whose sum is σ = 247246761600. Its totient is φ = 79043852160.

The previous prime is 161440316777. The next prime is 161440316827. The reversal of 161440316806 is 608613044161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11500600 + ... + 11514628.

It is an arithmetic number, because the mean of its divisors is an integer number (7726461300).

Almost surely, 2^161440316806 is an apocalyptic number.

161440316806 is a deficient number, since it is larger than the sum of its proper divisors (85806444794).

161440316806 is a wasteful number, since it uses less digits than its factorization.

161440316806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14704.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 161440316806 in words is "one hundred sixty-one billion, four hundred forty million, three hundred sixteen thousand, eight hundred six".