161736644106 has 32 divisors (see below), whose sum is σ = 359430456000. Its totient is φ = 53909861040.

The previous prime is 161736644099. The next prime is 161736644119. The reversal of 161736644106 is 601446637161.

161736644106 is a `hidden beast` number, since 1 + 6 + 173 + 6 + 64 + 410 + 6 = 666.

It is a Curzon 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, 1548420 + ... + 1649568.

It is an arithmetic number, because the mean of its divisors is an integer number (11232201750).

Almost surely, 2^161736644106 is an apocalyptic number.

161736644106 is an abundant number, since it is smaller than the sum of its proper divisors (197693811894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161736644106 is a wasteful number, since it uses less digits than its factorization.

161736644106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130771 (or 130765 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 161736644106 in words is "one hundred sixty-one billion, seven hundred thirty-six million, six hundred forty-four thousand, one hundred six".