256782433627703 has 8 divisors (see below), whose sum is σ = 257904086961456. Its totient is φ = 255660947668800.

The previous prime is 256782433627669. The next prime is 256782433627717. The reversal of 256782433627703 is 307726334287652.

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

It is a cyclic number.

It is not a de Polignac number, because 256782433627703 - 2¹⁸ = 256782433365559 is a prime.

It is a super-3 number, since 3×256782433627703³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256782433627703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256782433629703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38768168 + ... + 44905853.

It is an arithmetic number, because the mean of its divisors is an integer number (32238010870182).

Almost surely, 2^{256782433627703} is an apocalyptic number.

256782433627703 is a deficient number, since it is larger than the sum of its proper divisors (1121653333753).

256782433627703 is a wasteful number, since it uses less digits than its factorization.

256782433627703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83687425.

The product of its (nonzero) digits is 426746880, while the sum is 65.

The spelling of 256782433627703 in words is "two hundred fifty-six trillion, seven hundred eighty-two billion, four hundred thirty-three million, six hundred twenty-seven thousand, seven hundred three".