161751012 has 24 divisors (see below), whose sum is σ = 379509312. Its totient is φ = 53618400.

The previous prime is 161751011. The next prime is 161751041. The reversal of 161751012 is 210157161.

161751012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161751011) 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, 35064 + ... + 39407.

It is an arithmetic number, because the mean of its divisors is an integer number (15812888).

Almost surely, 2^161751012 is an apocalyptic number.

161751012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161751012 is an abundant number, since it is smaller than the sum of its proper divisors (217758300).

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

161751012 is a wasteful number, since it uses less digits than its factorization.

161751012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74659 (or 74657 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 24.

The square root of 161751012 is about 12718.1371277401. The cubic root of 161751012 is about 544.8567499389.

The spelling of 161751012 in words is "one hundred sixty-one million, seven hundred fifty-one thousand, twelve".