161004080 has 40 divisors (see below), whose sum is σ = 386415744. Its totient is φ = 62323200.

The previous prime is 161004047. The next prime is 161004091. The reversal of 161004080 is 80400161.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 29981 + ... + 34940.

Almost surely, 2^161004080 is an apocalyptic number.

161004080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161004080 is an abundant number, since it is smaller than the sum of its proper divisors (225411664).

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

161004080 is a wasteful number, since it uses less digits than its factorization.

161004080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64965 (or 64959 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 161004080 is about 12688.7383139538. The cubic root of 161004080 is about 544.0167778851.

The spelling of 161004080 in words is "one hundred sixty-one million, four thousand, eighty".