256506101212 has 12 divisors (see below), whose sum is σ = 453513365200. Its totient is φ = 126930854016.

The previous prime is 256506101177. The next prime is 256506101239. The reversal of 256506101212 is 212101605652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330548712 + ... + 330549487.

Almost surely, 2^256506101212 is an apocalyptic number.

It is an amenable number.

256506101212 is a deficient number, since it is larger than the sum of its proper divisors (197007263988).

256506101212 is a wasteful number, since it uses less digits than its factorization.

256506101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661098300 (or 661098298 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 256506101212 its reverse (212101605652), we get a palindrome (468607706864).

The spelling of 256506101212 in words is "two hundred fifty-six billion, five hundred six million, one hundred one thousand, two hundred twelve".