256242411465 has 16 divisors (see below), whose sum is σ = 414214539648. Its totient is φ = 135253725696.

The previous prime is 256242411457. The next prime is 256242411473. The reversal of 256242411465 is 564114242652.

It is an interprime number because it is at equal distance from previous prime (256242411457) and next prime (256242411473).

It is not a de Polignac number, because 256242411465 - 2³ = 256242411457 is a prime.

It is a super-3 number, since 3×256242411465³ (a number of 35 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88054357 + ... + 88057266.

It is an arithmetic number, because the mean of its divisors is an integer number (25888408728).

Almost surely, 2^256242411465 is an apocalyptic number.

It is an amenable number.

256242411465 is a deficient number, since it is larger than the sum of its proper divisors (157972128183).

256242411465 is a wasteful number, since it uses less digits than its factorization.

256242411465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176111728.

The product of its digits is 460800, while the sum is 42.

The spelling of 256242411465 in words is "two hundred fifty-six billion, two hundred forty-two million, four hundred eleven thousand, four hundred sixty-five".