256136073 has 8 divisors (see below), whose sum is σ = 356363328. Its totient is φ = 163333104.

The previous prime is 256136053. The next prime is 256136087. The reversal of 256136073 is 370631652.

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

It is not a de Polignac number, because 256136073 - 2⁶ = 256136009 is a prime.

It is a super-2 number, since 2×256136073² = 131211375783722658, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (256136053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1855990 + ... + 1856127.

It is an arithmetic number, because the mean of its divisors is an integer number (44545416).

Almost surely, 2^256136073 is an apocalyptic number.

256136073 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

256136073 is a deficient number, since it is larger than the sum of its proper divisors (100227255).

256136073 is a wasteful number, since it uses less digits than its factorization.

256136073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3712143.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 256136073 is about 16004.2517163409. The cubic root of 256136073 is about 635.0729021225.

The spelling of 256136073 in words is "two hundred fifty-six million, one hundred thirty-six thousand, seventy-three".