256563160442 has 8 divisors (see below), whose sum is σ = 397259087232. Its totient is φ = 124143464700.

The previous prime is 256563160429. The next prime is 256563160481. The reversal of 256563160442 is 244061365652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 256563160393 and 256563160402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2069057684 + ... + 2069057807.

It is an arithmetic number, because the mean of its divisors is an integer number (49657385904).

Almost surely, 2^256563160442 is an apocalyptic number.

256563160442 is a deficient number, since it is larger than the sum of its proper divisors (140695926790).

256563160442 is a wasteful number, since it uses less digits than its factorization.

256563160442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138115524.

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

The spelling of 256563160442 in words is "two hundred fifty-six billion, five hundred sixty-three million, one hundred sixty thousand, four hundred forty-two".