161653351 has 8 divisors (see below), whose sum is σ = 165553344. Its totient is φ = 157772640.

The previous prime is 161653309. The next prime is 161653381. The reversal of 161653351 is 153356161.

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 161653351 - 2²⁷ = 27435623 is a prime.

It is a super-2 number, since 2×161653351² = 52263611779058402, 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 (161653301) 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 7 ways as a sum of consecutive naturals, for example, 12921 + ... + 22141.

It is an arithmetic number, because the mean of its divisors is an integer number (20694168).

Almost surely, 2^161653351 is an apocalyptic number.

161653351 is a deficient number, since it is larger than the sum of its proper divisors (3899993).

161653351 is an equidigital number, since it uses as much as digits as its factorization.

161653351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9641.

The product of its digits is 8100, while the sum is 31.

The square root of 161653351 is about 12714.2971099467. The cubic root of 161653351 is about 544.7470711448.

The spelling of 161653351 in words is "one hundred sixty-one million, six hundred fifty-three thousand, three hundred fifty-one".