161247622721000 has 64 divisors (see below), whose sum is σ = 377700185640960. Its totient is φ = 64433963880000.

The previous prime is 161247622720981. The next prime is 161247622721027. The reversal of 161247622721000 is 127226742161.

It is a super-3 number, since 3×161247622721000³ (a number of 44 digits) contains 333 as substring.

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, 80365016 + ... + 82347015.

It is an arithmetic number, because the mean of its divisors is an integer number (5901565400640).

Almost surely, 2^{161247622721000} is an apocalyptic number.

161247622721000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161247622721000 is an abundant number, since it is smaller than the sum of its proper divisors (216452562919960).

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

161247622721000 is a wasteful number, since it uses less digits than its factorization.

161247622721000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162713043 (or 162713029 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 161247622721000 in words is "one hundred sixty-one trillion, two hundred forty-seven billion, six hundred twenty-two million, seven hundred twenty-one thousand".