161352040 has 32 divisors (see below), whose sum is σ = 365368680. Its totient is φ = 64127232.

The previous prime is 161352029. The next prime is 161352089. The reversal of 161352040 is 40253161.

It can be written as a sum of positive squares in 4 ways, for example, as 142706916 + 18645124 = 11946^2 + 4318^2 .

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, 6567 + ... + 19126.

Almost surely, 2^161352040 is an apocalyptic number.

161352040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161352040 is an abundant number, since it is smaller than the sum of its proper divisors (204016640).

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

161352040 is a wasteful number, since it uses less digits than its factorization.

161352040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25861 (or 25857 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 161352040 is about 12702.4422848522. The cubic root of 161352040 is about 544.4084033094.

The spelling of 161352040 in words is "one hundred sixty-one million, three hundred fifty-two thousand, forty".