161385707532 has 54 divisors (see below), whose sum is σ = 438073362972. Its totient is φ = 46107418896.

The previous prime is 161385707531. The next prime is 161385707641. The reversal of 161385707532 is 235707583161.

It is not an unprimeable number, because it can be changed into a prime (161385707531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9733113 + ... + 9749679.

Almost surely, 2^161385707532 is an apocalyptic number.

161385707532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161385707532 is an abundant number, since it is smaller than the sum of its proper divisors (276687655440).

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

161385707532 is an frugal number, since it uses more digits than its factorization.

161385707532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33155 (or 16579 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 48.

Multiplying 161385707532 by its sum of digits (48), we get a square (7746513961536 = 2783256²).

The spelling of 161385707532 in words is "one hundred sixty-one billion, three hundred eighty-five million, seven hundred seven thousand, five hundred thirty-two".