256516212603 has 48 divisors (see below), whose sum is σ = 405910552320. Its totient is φ = 143631432000.

The previous prime is 256516212559. The next prime is 256516212619. The reversal of 256516212603 is 306212615652.

It is not a de Polignac number, because 256516212603 - 2⁶ = 256516212539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256516212683) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2649753 + ... + 2744853.

It is an arithmetic number, because the mean of its divisors is an integer number (8456469840).

Almost surely, 2^256516212603 is an apocalyptic number.

256516212603 is a deficient number, since it is larger than the sum of its proper divisors (149394339717).

256516212603 is a wasteful number, since it uses less digits than its factorization.

256516212603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95488 (or 95481 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 256516212603 in words is "two hundred fifty-six billion, five hundred sixteen million, two hundred twelve thousand, six hundred three".