256702235567 has 4 divisors (see below), whose sum is σ = 256706501880. Its totient is φ = 256697969256.

The previous prime is 256702235521. The next prime is 256702235579. The reversal of 256702235567 is 765532207652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256702235567 - 2¹⁴ = 256702219183 is a prime.

It is a super-2 number, since 2×256702235567² (a number of 24 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 (256702235597) 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, 2041592 + ... + 2163677.

It is an arithmetic number, because the mean of its divisors is an integer number (64176625470).

Almost surely, 2^256702235567 is an apocalyptic number.

256702235567 is a deficient number, since it is larger than the sum of its proper divisors (4266313).

256702235567 is an equidigital number, since it uses as much as digits as its factorization.

256702235567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4266312.

The product of its (nonzero) digits is 5292000, while the sum is 50.

The spelling of 256702235567 in words is "two hundred fifty-six billion, seven hundred two million, two hundred thirty-five thousand, five hundred sixty-seven".