256264477742 has 64 divisors (see below), whose sum is σ = 486149516160. Its totient is φ = 98586740736.

The previous prime is 256264477673. The next prime is 256264477787. The reversal of 256264477742 is 247774462652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14058218 + ... + 14076434.

It is an arithmetic number, because the mean of its divisors is an integer number (7596086190).

Almost surely, 2^256264477742 is an apocalyptic number.

256264477742 is a deficient number, since it is larger than the sum of its proper divisors (229885038418).

256264477742 is a wasteful number, since it uses less digits than its factorization.

256264477742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20365.

The product of its digits is 31610880, while the sum is 56.

The spelling of 256264477742 in words is "two hundred fifty-six billion, two hundred sixty-four million, four hundred seventy-seven thousand, seven hundred forty-two".