161335270 has 64 divisors (see below), whose sum is σ = 326592000. Its totient is φ = 57024000.

The previous prime is 161335211. The next prime is 161335297. The reversal of 161335270 is 72533161.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 642645 + ... + 642895.

It is an arithmetic number, because the mean of its divisors is an integer number (5103000).

Almost surely, 2^161335270 is an apocalyptic number.

161335270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161335270 is an abundant number, since it is smaller than the sum of its proper divisors (165256730).

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

161335270 is a wasteful number, since it uses less digits than its factorization.

161335270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 161335270 is about 12701.7821584217. The cubic root of 161335270 is about 544.3895417665.

The spelling of 161335270 in words is "one hundred sixty-one million, three hundred thirty-five thousand, two hundred seventy".