159555657 has 4 divisors (see below), whose sum is σ = 212740880. Its totient is φ = 106370436.

The previous prime is 159555653. The next prime is 159555677. The reversal of 159555657 is 756555951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 159555657 - 2² = 159555653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159555653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26592607 + ... + 26592612.

It is an arithmetic number, because the mean of its divisors is an integer number (53185220).

Almost surely, 2^159555657 is an apocalyptic number.

It is an amenable number.

159555657 is a deficient number, since it is larger than the sum of its proper divisors (53185223).

159555657 is an equidigital number, since it uses as much as digits as its factorization.

159555657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53185222.

The product of its digits is 1181250, while the sum is 48.

The square root of 159555657 is about 12631.5342298551. The cubic root of 159555657 is about 542.3805021826.

It can be divided in two parts, 15955 and 5657, that added together give a palindrome (21612).

The spelling of 159555657 in words is "one hundred fifty-nine million, five hundred fifty-five thousand, six hundred fifty-seven".