161707247340 has 96 divisors (see below), whose sum is σ = 480455769024. Its totient is φ = 40497192960.

The previous prime is 161707247293. The next prime is 161707247353. The reversal of 161707247340 is 43742707161.

It is a happy number.

161707247340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161707247340² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161707247292 and 161707247301.

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 31 ways as a sum of consecutive naturals, for example, 298272 + ... + 642168.

It is an arithmetic number, because the mean of its divisors is an integer number (5004747594).

Almost surely, 2^161707247340 is an apocalyptic number.

161707247340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161707247340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240227884512).

161707247340 is an abundant number, since it is smaller than the sum of its proper divisors (318748521684).

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

161707247340 is a wasteful number, since it uses less digits than its factorization.

161707247340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344387 (or 344385 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 42.

The spelling of 161707247340 in words is "one hundred sixty-one billion, seven hundred seven million, two hundred forty-seven thousand, three hundred forty".