161352540 has 48 divisors (see below), whose sum is σ = 501987360. Its totient is φ = 43027200.

The previous prime is 161352539. The next prime is 161352553. The reversal of 161352540 is 45253161.

161352540 is a `hidden beast` number, since 1 + 613 + 5 + 2 + 5 + 40 = 666.

161352540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148861 + ... + 149940.

It is an arithmetic number, because the mean of its divisors is an integer number (10458070).

Almost surely, 2^161352540 is an apocalyptic number.

161352540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161352540 is an abundant number, since it is smaller than the sum of its proper divisors (340634820).

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

161352540 is a wasteful number, since it uses less digits than its factorization.

161352540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298819 (or 298811 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 161352540 is about 12702.4619660915. The cubic root of 161352540 is about 544.4089656490.

The spelling of 161352540 in words is "one hundred sixty-one million, three hundred fifty-two thousand, five hundred forty".