256873411619 has 8 divisors (see below), whose sum is σ = 280267576320. Its totient is φ = 233486253000.

The previous prime is 256873411589. The next prime is 256873411657. The reversal of 256873411619 is 916114378652.

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

It is not a de Polignac number, because 256873411619 - 2⁸ = 256873411363 is a prime.

It is a super-2 number, since 2×256873411619² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256873411699) 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, 1674707 + ... + 1821644.

It is an arithmetic number, because the mean of its divisors is an integer number (35033447040).

Almost surely, 2^256873411619 is an apocalyptic number.

256873411619 is a deficient number, since it is larger than the sum of its proper divisors (23394164701).

256873411619 is a wasteful number, since it uses less digits than its factorization.

256873411619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3503041.

The product of its digits is 2177280, while the sum is 53.

The spelling of 256873411619 in words is "two hundred fifty-six billion, eight hundred seventy-three million, four hundred eleven thousand, six hundred nineteen".