161906726 has 8 divisors (see below), whose sum is σ = 243876960. Its totient is φ = 80614408.

The previous prime is 161906711. The next prime is 161906761. The reversal of 161906726 is 627609161.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 161906726.

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, 168881 + ... + 169836.

It is an arithmetic number, because the mean of its divisors is an integer number (30484620).

Almost surely, 2^161906726 is an apocalyptic number.

161906726 is a deficient number, since it is larger than the sum of its proper divisors (81970234).

161906726 is a wasteful number, since it uses less digits than its factorization.

161906726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338958.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 161906726 is about 12724.2573850107. The cubic root of 161906726 is about 545.0315342413.

The spelling of 161906726 in words is "one hundred sixty-one million, nine hundred six thousand, seven hundred twenty-six".