256145216155347 has 32 divisors (see below), whose sum is σ = 355189024669696. Its totient is φ = 164019056025600.

The previous prime is 256145216155343. The next prime is 256145216155391. The reversal of 256145216155347 is 743551612541652.

It is not a de Polignac number, because 256145216155347 - 2² = 256145216155343 is a prime.

It is a super-3 number, since 3×256145216155347³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (256145216155343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8706979 + ... + 24250812.

It is an arithmetic number, because the mean of its divisors is an integer number (11099657020928).

Almost surely, 2^{256145216155347} is an apocalyptic number.

256145216155347 is a deficient number, since it is larger than the sum of its proper divisors (99043808514349).

256145216155347 is a wasteful number, since it uses less digits than its factorization.

256145216155347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32958451.

The product of its digits is 30240000, while the sum is 57.

Adding to 256145216155347 its reverse (743551612541652), we get a palindrome (999696828696999).

The spelling of 256145216155347 in words is "two hundred fifty-six trillion, one hundred forty-five billion, two hundred sixteen million, one hundred fifty-five thousand, three hundred forty-seven".