160643551 has 4 divisors (see below), whose sum is σ = 161799400. Its totient is φ = 159487704.

The previous prime is 160643533. The next prime is 160643563. The reversal of 160643551 is 155346061.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 160643551 - 2²³ = 152254943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160643521) 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 3 ways as a sum of consecutive naturals, for example, 577716 + ... + 577993.

It is an arithmetic number, because the mean of its divisors is an integer number (40449850).

Almost surely, 2^160643551 is an apocalyptic number.

160643551 is a deficient number, since it is larger than the sum of its proper divisors (1155849).

160643551 is a wasteful number, since it uses less digits than its factorization.

160643551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155848.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 160643551 is about 12674.5236991376. The cubic root of 160643551 is about 543.6104105327.

The spelling of 160643551 in words is "one hundred sixty million, six hundred forty-three thousand, five hundred fifty-one".