256745145011005 has 64 divisors (see below), whose sum is σ = 355139804229120. Its totient is φ = 174541177958400.

The previous prime is 256745145010979. The next prime is 256745145011041. The reversal of 256745145011005 is 500110541547652.

It is not a de Polignac number, because 256745145011005 - 2¹⁵ = 256745144978237 is a prime.

It is a super-2 number, since 2×256745145011005² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29616461811 + ... + 29616470479.

It is an arithmetic number, because the mean of its divisors is an integer number (5549059441080).

Almost surely, 2^{256745145011005} is an apocalyptic number.

It is an amenable number.

256745145011005 is a deficient number, since it is larger than the sum of its proper divisors (98394659218115).

256745145011005 is a wasteful number, since it uses less digits than its factorization.

256745145011005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16150.

The product of its (nonzero) digits is 840000, while the sum is 46.

Adding to 256745145011005 its reverse (500110541547652), we get a palindrome (756855686558657).

The spelling of 256745145011005 in words is "two hundred fifty-six trillion, seven hundred forty-five billion, one hundred forty-five million, eleven thousand, five".