256105046142 has 24 divisors (see below), whose sum is σ = 605339200440. Its totient is φ = 77607589680.

The previous prime is 256105046129. The next prime is 256105046173. The reversal of 256105046142 is 241640501652.

256105046142 is a `hidden beast` number, since 2 + 5 + 6 + 1 + 0 + 504 + 6 + 142 = 666.

256105046142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 256105046097 and 256105046106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 646729717 + ... + 646730112.

It is an arithmetic number, because the mean of its divisors is an integer number (25222466685).

Almost surely, 2^256105046142 is an apocalyptic number.

256105046142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

256105046142 is an abundant number, since it is smaller than the sum of its proper divisors (349234154298).

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

256105046142 is a wasteful number, since it uses less digits than its factorization.

256105046142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293459848 (or 1293459845 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 256105046142 its reverse (241640501652), we get a palindrome (497745547794).

The spelling of 256105046142 in words is "two hundred fifty-six billion, one hundred five million, forty-six thousand, one hundred forty-two".