256510041617469 has 4 divisors (see below), whose sum is σ = 342013388823296. Its totient is φ = 171006694411644.

The previous prime is 256510041617447. The next prime is 256510041617539. The reversal of 256510041617469 is 964716140015652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 256510041617469 - 2⁷ = 256510041617341 is a prime.

It is a super-2 number, since 2×256510041617469² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256510041617569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42751673602909 + ... + 42751673602914.

It is an arithmetic number, because the mean of its divisors is an integer number (85503347205824).

Almost surely, 2^{256510041617469} is an apocalyptic number.

It is an amenable number.

256510041617469 is a deficient number, since it is larger than the sum of its proper divisors (85503347205827).

256510041617469 is an equidigital number, since it uses as much as digits as its factorization.

256510041617469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85503347205826.

The product of its (nonzero) digits is 10886400, while the sum is 57.

The spelling of 256510041617469 in words is "two hundred fifty-six trillion, five hundred ten billion, forty-one million, six hundred seventeen thousand, four hundred sixty-nine".