161657853 has 8 divisors (see below), whose sum is σ = 246335808. Its totient is φ = 92375904.

The previous prime is 161657819. The next prime is 161657857. The reversal of 161657853 is 358756161.

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

It is not a de Polignac number, because 161657853 - 2²⁰ = 160609277 is a prime.

It is a super-2 number, since 2×161657853² = 52266522873139218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161657857) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3848976 + ... + 3849017.

It is an arithmetic number, because the mean of its divisors is an integer number (30791976).

Almost surely, 2^161657853 is an apocalyptic number.

It is an amenable number.

161657853 is a deficient number, since it is larger than the sum of its proper divisors (84677955).

161657853 is an equidigital number, since it uses as much as digits as its factorization.

161657853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7698003.

The product of its digits is 151200, while the sum is 42.

The square root of 161657853 is about 12714.4741534992. The cubic root of 161657853 is about 544.7521281150.

The spelling of 161657853 in words is "one hundred sixty-one million, six hundred fifty-seven thousand, eight hundred fifty-three".