161504040 has 64 divisors (see below), whose sum is σ = 485352000. Its totient is φ = 42993152.

The previous prime is 161504033. The next prime is 161504041. The reversal of 161504040 is 40405161.

It is a super-3 number, since 3×161504040³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161503998 and 161504016.

It is not an unprimeable number, because it can be changed into a prime (161504041) 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 15 ways as a sum of consecutive naturals, for example, 125239 + ... + 126521.

It is an arithmetic number, because the mean of its divisors is an integer number (7583625).

Almost surely, 2^161504040 is an apocalyptic number.

161504040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161504040 is an abundant number, since it is smaller than the sum of its proper divisors (323847960).

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

161504040 is a wasteful number, since it uses less digits than its factorization.

161504040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346 (or 2342 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 161504040 is about 12708.4239778188. The cubic root of 161504040 is about 544.5793010687.

The spelling of 161504040 in words is "one hundred sixty-one million, five hundred four thousand, forty".