159551894 has 4 divisors (see below), whose sum is σ = 239327844. Its totient is φ = 79775946.

The previous prime is 159551893. The next prime is 159551921. The reversal of 159551894 is 498155951.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159551893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39887972 + ... + 39887975.

It is an arithmetic number, because the mean of its divisors is an integer number (59831961).

Almost surely, 2^159551894 is an apocalyptic number.

159551894 is a deficient number, since it is larger than the sum of its proper divisors (79775950).

159551894 is an equidigital number, since it uses as much as digits as its factorization.

159551894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79775949.

The product of its digits is 324000, while the sum is 47.

The square root of 159551894 is about 12631.3852763662. The cubic root of 159551894 is about 542.3762382705.

The spelling of 159551894 in words is "one hundred fifty-nine million, five hundred fifty-one thousand, eight hundred ninety-four".