256016613 has 4 divisors (see below), whose sum is σ = 341355488. Its totient is φ = 170677740.

The previous prime is 256016533. The next prime is 256016627. The reversal of 256016613 is 316610652.

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 256016613 - 2¹⁶ = 255951077 is a prime.

It is a super-2 number, since 2×256016613² = 131089012263983538, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256016213) 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, 42669433 + ... + 42669438.

It is an arithmetic number, because the mean of its divisors is an integer number (85338872).

Almost surely, 2^256016613 is an apocalyptic number.

It is an amenable number.

256016613 is a deficient number, since it is larger than the sum of its proper divisors (85338875).

256016613 is an equidigital number, since it uses as much as digits as its factorization.

256016613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85338874.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 256016613 is about 16000.5191478277. The cubic root of 256016613 is about 634.9741556431.

The spelling of 256016613 in words is "two hundred fifty-six million, sixteen thousand, six hundred thirteen".