147731557729 has 4 divisors (see below), whose sum is σ = 168836065984. Its totient is φ = 126627049476.

The previous prime is 147731557709. The next prime is 147731557733. The reversal of 147731557729 is 927755137741.

147731557729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 147731557729 - 2⁵ = 147731557697 is a prime.

It is a super-2 number, since 2×147731557729² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147731557709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10552254117 + ... + 10552254130.

It is an arithmetic number, because the mean of its divisors is an integer number (42209016496).

Almost surely, 2^147731557729 is an apocalyptic number.

It is an amenable number.

147731557729 is a deficient number, since it is larger than the sum of its proper divisors (21104508255).

147731557729 is an equidigital number, since it uses as much as digits as its factorization.

147731557729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21104508254.

The product of its digits is 12965400, while the sum is 58.

The spelling of 147731557729 in words is "one hundred forty-seven billion, seven hundred thirty-one million, five hundred fifty-seven thousand, seven hundred twenty-nine".