256304737442 has 64 divisors (see below), whose sum is σ = 435442936320. Its totient is φ = 112343728896.

The previous prime is 256304737433. The next prime is 256304737459. The reversal of 256304737442 is 244737403652.

It is a Harshad number since it is a multiple of its sum of digits (47).

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 31 ways as a sum of consecutive naturals, for example, 17128628 + ... + 17143584.

It is an arithmetic number, because the mean of its divisors is an integer number (6803795880).

Almost surely, 2^256304737442 is an apocalyptic number.

256304737442 is a deficient number, since it is larger than the sum of its proper divisors (179138198878).

256304737442 is a wasteful number, since it uses less digits than its factorization.

256304737442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15435.

The product of its (nonzero) digits is 3386880, while the sum is 47.

The spelling of 256304737442 in words is "two hundred fifty-six billion, three hundred four million, seven hundred thirty-seven thousand, four hundred forty-two".