161541340 has 24 divisors (see below), whose sum is σ = 341831952. Its totient is φ = 64122240.

The previous prime is 161541337. The next prime is 161541343. The reversal of 161541340 is 43145161.

161541340 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161541337) and next prime (161541343).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161541343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28209 + ... + 33448.

It is an arithmetic number, because the mean of its divisors is an integer number (14242998).

Almost surely, 2^161541340 is an apocalyptic number.

161541340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161541340 is an abundant number, since it is smaller than the sum of its proper divisors (180290612).

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

161541340 is a wasteful number, since it uses less digits than its factorization.

161541340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61797 (or 61795 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 161541340 is about 12709.8914236118. The cubic root of 161541340 is about 544.6212220929.

The spelling of 161541340 in words is "one hundred sixty-one million, five hundred forty-one thousand, three hundred forty".