161608351 has 8 divisors (see below), whose sum is σ = 163354464. Its totient is φ = 159870720.

The previous prime is 161608333. The next prime is 161608361. The reversal of 161608351 is 153806161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161608351 - 2¹⁷ = 161477279 is a prime.

It is a super-2 number, since 2×161608351² = 52234518225878402, 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 (161608331) 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, 40711 + ... + 44503.

It is an arithmetic number, because the mean of its divisors is an integer number (20419308).

Almost surely, 2^161608351 is an apocalyptic number.

161608351 is a deficient number, since it is larger than the sum of its proper divisors (1746113).

161608351 is a wasteful number, since it uses less digits than its factorization.

161608351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4241.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 161608351 is about 12712.5273254377. The cubic root of 161608351 is about 544.6965187476.

The spelling of 161608351 in words is "one hundred sixty-one million, six hundred eight thousand, three hundred fifty-one".