161593356 has 24 divisors (see below), whose sum is σ = 387242800. Its totient is φ = 52408512.

The previous prime is 161593351. The next prime is 161593409. The reversal of 161593356 is 653395161.

It is a super-2 number, since 2×161593356² = 52224825406685472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161593351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181531 + ... + 182418.

Almost surely, 2^161593356 is an apocalyptic number.

It is an amenable number.

161593356 is an abundant number, since it is smaller than the sum of its proper divisors (225649444).

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

161593356 is a wasteful number, since it uses less digits than its factorization.

161593356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363993 (or 363991 counting only the distinct ones).

The product of its digits is 72900, while the sum is 39.

The square root of 161593356 is about 12711.9375391795. The cubic root of 161593356 is about 544.6796714810.

The spelling of 161593356 in words is "one hundred sixty-one million, five hundred ninety-three thousand, three hundred fifty-six".