161011646 has 8 divisors (see below), whose sum is σ = 242744040. Its totient is φ = 80096968.

The previous prime is 161011603. The next prime is 161011657. The reversal of 161011646 is 646110161.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203936 + ... + 204723.

It is an arithmetic number, because the mean of its divisors is an integer number (30343005).

Almost surely, 2^161011646 is an apocalyptic number.

161011646 is a deficient number, since it is larger than the sum of its proper divisors (81732394).

161011646 is a wasteful number, since it uses less digits than its factorization.

161011646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408858.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 161011646 is about 12689.0364488404. The cubic root of 161011646 is about 544.0252993388.

The spelling of 161011646 in words is "one hundred sixty-one million, eleven thousand, six hundred forty-six".