161606149217322 has 64 divisors (see below), whose sum is σ = 326849402880000. Its totient is φ = 53264191045248.

The previous prime is 161606149217311. The next prime is 161606149217339. The reversal of 161606149217322 is 223712941606161.

It is a super-2 number, since 2×161606149217322² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1140257179 + ... + 1140398897.

It is an arithmetic number, because the mean of its divisors is an integer number (5107021920000).

Almost surely, 2^{161606149217322} is an apocalyptic number.

161606149217322 is an abundant number, since it is smaller than the sum of its proper divisors (165243253662678).

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

161606149217322 is a wasteful number, since it uses less digits than its factorization.

161606149217322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144635.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 161606149217322 in words is "one hundred sixty-one trillion, six hundred six billion, one hundred forty-nine million, two hundred seventeen thousand, three hundred twenty-two".