646156560229 has 8 divisors (see below), whose sum is σ = 665589463448. Its totient is φ = 626827299840.

The previous prime is 646156560169. The next prime is 646156560263. The reversal of 646156560229 is 922065651646.

It can be written as a sum of positive squares in 4 ways, for example, as 139874504004 + 506282056225 = 373998^2 + 711535^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 646156560229 - 2²⁵ = 646123005797 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 (646156560529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25898052 + ... + 25922989.

It is an arithmetic number, because the mean of its divisors is an integer number (83198682931).

Almost surely, 2^646156560229 is an apocalyptic number.

It is an amenable number.

646156560229 is a deficient number, since it is larger than the sum of its proper divisors (19432903219).

646156560229 is a wasteful number, since it uses less digits than its factorization.

646156560229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51821415.

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 646156560229 in words is "six hundred forty-six billion, one hundred fifty-six million, five hundred sixty thousand, two hundred twenty-nine".