256145216155346 has 64 divisors (see below), whose sum is σ = 448337697884160. Its totient is φ = 107485083164160.

The previous prime is 256145216155343. The next prime is 256145216155391. The reversal of 256145216155346 is 643551612541652.

It is a super-2 number, since 2×256145216155346² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256145216155291 and 256145216155300.

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

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3277277300 + ... + 3277355456.

It is an arithmetic number, because the mean of its divisors is an integer number (7005276529440).

Almost surely, 2^{256145216155346} is an apocalyptic number.

256145216155346 is a deficient number, since it is larger than the sum of its proper divisors (192192481728814).

256145216155346 is a wasteful number, since it uses less digits than its factorization.

256145216155346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95659.

The product of its digits is 25920000, while the sum is 56.

Adding to 256145216155346 its reverse (643551612541652), we get a palindrome (899696828696998).

The spelling of 256145216155346 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-six".