256164213535 has 8 divisors (see below), whose sum is σ = 307403318016. Its totient is φ = 204927196320.

The previous prime is 256164213521. The next prime is 256164213553. The reversal of 256164213535 is 535312461652.

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

It is not a de Polignac number, because 256164213535 - 2⁷ = 256164213407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256164213491 and 256164213500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237756 + ... + 754225.

It is an arithmetic number, because the mean of its divisors is an integer number (38425414752).

Almost surely, 2^256164213535 is an apocalyptic number.

256164213535 is a deficient number, since it is larger than the sum of its proper divisors (51239104481).

256164213535 is an equidigital number, since it uses as much as digits as its factorization.

256164213535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043633.

The product of its digits is 648000, while the sum is 43.

The spelling of 256164213535 in words is "two hundred fifty-six billion, one hundred sixty-four million, two hundred thirteen thousand, five hundred thirty-five".