256163522148 has 18 divisors (see below), whose sum is σ = 647524458854. Its totient is φ = 85387840704.

The previous prime is 256163522099. The next prime is 256163522149. The reversal of 256163522148 is 841225361652.

256163522148 is a `hidden beast` number, since 2 + 5 + 6 + 1 + 635 + 2 + 2 + 1 + 4 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 220188054564 + 35975467584 = 469242^2 + 189672^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (256163522149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3557826661 + ... + 3557826732.

Almost surely, 2^256163522148 is an apocalyptic number.

It is an amenable number.

256163522148 is an abundant number, since it is smaller than the sum of its proper divisors (391360936706).

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

256163522148 is a wasteful number, since it uses less digits than its factorization.

256163522148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7115653403 (or 7115653398 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The spelling of 256163522148 in words is "two hundred fifty-six billion, one hundred sixty-three million, five hundred twenty-two thousand, one hundred forty-eight".