256264225136 has 40 divisors (see below), whose sum is σ = 518211073440. Its totient is φ = 122534736896.

The previous prime is 256264225103. The next prime is 256264225153. The reversal of 256264225136 is 631522462652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1691180 + ... + 1836468.

It is an arithmetic number, because the mean of its divisors is an integer number (12955276836).

Almost surely, 2^256264225136 is an apocalyptic number.

It is an amenable number.

256264225136 is an abundant number, since it is smaller than the sum of its proper divisors (261946848304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256264225136 is a wasteful number, since it uses less digits than its factorization.

256264225136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150113 (or 150107 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 44.

Adding to 256264225136 its reverse (631522462652), we get a palindrome (887786687788).

The spelling of 256264225136 in words is "two hundred fifty-six billion, two hundred sixty-four million, two hundred twenty-five thousand, one hundred thirty-six".