161706206120 has 32 divisors (see below), whose sum is σ = 366616372320. Its totient is φ = 64188720960.

The previous prime is 161706206113. The next prime is 161706206131. The reversal of 161706206120 is 21602607161.

It is a super-2 number, since 2×161706206120² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15424742 + ... + 15435221.

It is an arithmetic number, because the mean of its divisors is an integer number (11456761635).

Almost surely, 2^161706206120 is an apocalyptic number.

161706206120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161706206120 is an abundant number, since it is smaller than the sum of its proper divisors (204910166200).

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

161706206120 is a wasteful number, since it uses less digits than its factorization.

161706206120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30860105 (or 30860101 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 161706206120 in words is "one hundred sixty-one billion, seven hundred six million, two hundred six thousand, one hundred twenty".