256420361212 has 6 divisors (see below), whose sum is σ = 448735632128. Its totient is φ = 128210180604.

The previous prime is 256420361161. The next prime is 256420361213. The reversal of 256420361212 is 212163024652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256420361213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32052545148 + ... + 32052545155.

Almost surely, 2^256420361212 is an apocalyptic number.

It is an amenable number.

256420361212 is a deficient number, since it is larger than the sum of its proper divisors (192315270916).

256420361212 is a wasteful number, since it uses less digits than its factorization.

256420361212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64105090307 (or 64105090305 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 256420361212 its reverse (212163024652), we get a palindrome (468583385864).

The spelling of 256420361212 in words is "two hundred fifty-six billion, four hundred twenty million, three hundred sixty-one thousand, two hundred twelve".