161542770 has 32 divisors (see below), whose sum is σ = 388533888. Its totient is φ = 42985728.

The previous prime is 161542751. The next prime is 161542793. The reversal of 161542770 is 77245161.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9082 + ... + 20138.

It is an arithmetic number, because the mean of its divisors is an integer number (12141684).

Almost surely, 2^161542770 is an apocalyptic number.

161542770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161542770 is an abundant number, since it is smaller than the sum of its proper divisors (226991118).

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

161542770 is a wasteful number, since it uses less digits than its factorization.

161542770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11554.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 161542770 is about 12709.9476788852. The cubic root of 161542770 is about 544.6228291244.

The spelling of 161542770 in words is "one hundred sixty-one million, five hundred forty-two thousand, seven hundred seventy".