256264225142 has 4 divisors (see below), whose sum is σ = 384396337716. Its totient is φ = 128132112570.

The previous prime is 256264225103. The next prime is 256264225153. The reversal of 256264225142 is 241522462652.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 256264225142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64066056284 + ... + 64066056287.

It is an arithmetic number, because the mean of its divisors is an integer number (96099084429).

Almost surely, 2^256264225142 is an apocalyptic number.

256264225142 is a deficient number, since it is larger than the sum of its proper divisors (128132112574).

256264225142 is a wasteful number, since it uses less digits than its factorization.

256264225142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128132112573.

The product of its digits is 460800, while the sum is 41.

Adding to 256264225142 its reverse (241522462652), we get a palindrome (497786687794).

The spelling of 256264225142 in words is "two hundred fifty-six billion, two hundred sixty-four million, two hundred twenty-five thousand, one hundred forty-two".