161617357 has 4 divisors (see below), whose sum is σ = 176309856. Its totient is φ = 146924860.

The previous prime is 161617327. The next prime is 161617361. The reversal of 161617357 is 753716161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161617357 - 2¹¹ = 161615309 is a prime.

It is a super-2 number, since 2×161617357² = 52240340167330898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161617307) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7346233 + ... + 7346254.

It is an arithmetic number, because the mean of its divisors is an integer number (44077464).

Almost surely, 2^161617357 is an apocalyptic number.

It is an amenable number.

161617357 is a deficient number, since it is larger than the sum of its proper divisors (14692499).

161617357 is a wasteful number, since it uses less digits than its factorization.

161617357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14692498.

The product of its digits is 26460, while the sum is 37.

The square root of 161617357 is about 12712.8815380306. The cubic root of 161617357 is about 544.7066367184.

The spelling of 161617357 in words is "one hundred sixty-one million, six hundred seventeen thousand, three hundred fifty-seven".