161506960 has 20 divisors (see below), whose sum is σ = 375503868. Its totient is φ = 64602752.

The previous prime is 161506957. The next prime is 161506963. The reversal of 161506960 is 69605161.

It is an interprime number because it is at equal distance from previous prime (161506957) and next prime (161506963).

It can be written as a sum of positive squares in 2 ways, for example, as 87684496 + 73822464 = 9364^2 + 8592^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (161506963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1009339 + ... + 1009498.

Almost surely, 2^161506960 is an apocalyptic number.

161506960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161506960 is an abundant number, since it is smaller than the sum of its proper divisors (213996908).

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

161506960 is a wasteful number, since it uses less digits than its factorization.

161506960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018850 (or 2018844 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 161506960 is about 12708.5388617260. The cubic root of 161506960 is about 544.5825830546.

The spelling of 161506960 in words is "one hundred sixty-one million, five hundred six thousand, nine hundred sixty".