161620752 has 40 divisors (see below), whose sum is σ = 419955264. Its totient is φ = 53559424.

The previous prime is 161620727. The next prime is 161620757. The reversal of 161620752 is 257026161.

161620752 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161620752² = 52242534954091008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161620757) 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, 1428 + ... + 18035.

Almost surely, 2^161620752 is an apocalyptic number.

161620752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161620752 is an abundant number, since it is smaller than the sum of its proper divisors (258334512).

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

161620752 is a wasteful number, since it uses less digits than its factorization.

161620752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19647 (or 19641 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 161620752 is about 12713.0150633121. The cubic root of 161620752 is about 544.7104508015.

The spelling of 161620752 in words is "one hundred sixty-one million, six hundred twenty thousand, seven hundred fifty-two".