161646948 has 72 divisors (see below), whose sum is σ = 445272800. Its totient is φ = 50702976.

The previous prime is 161646943. The next prime is 161646949. The reversal of 161646948 is 849646161.

It is a super-2 number, since 2×161646948² = 52259471595429408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161646941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28623 + ... + 33801.

Almost surely, 2^161646948 is an apocalyptic number.

161646948 is a gapful number since it is divisible by the number (18) 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 161646948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222636400).

161646948 is an abundant number, since it is smaller than the sum of its proper divisors (283625852).

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

161646948 is a wasteful number, since it uses less digits than its factorization.

161646948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5226 (or 5201 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 161646948 is about 12714.0453043081. The cubic root of 161646948 is about 544.7398786729.

The spelling of 161646948 in words is "one hundred sixty-one million, six hundred forty-six thousand, nine hundred forty-eight".