256602319487 has 8 divisors (see below), whose sum is σ = 265131873792. Its totient is φ = 248088519000.

The previous prime is 256602319439. The next prime is 256602319543. The reversal of 256602319487 is 784913206652.

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

It is a cyclic number.

It is not a de Polignac number, because 256602319487 - 2⁶ = 256602319423 is a prime.

It is a super-2 number, since 2×256602319487² (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 (256602319417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3905333 + ... + 3970494.

It is an arithmetic number, because the mean of its divisors is an integer number (33141484224).

It is a 2-persistent number, because it is pandigital, and so is 2⋅256602319487 = 513204638974, but 3⋅256602319487 = 769806958461 is not.

Almost surely, 2^256602319487 is an apocalyptic number.

256602319487 is a deficient number, since it is larger than the sum of its proper divisors (8529554305).

256602319487 is a wasteful number, since it uses less digits than its factorization.

256602319487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7876909.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 256602319487 in words is "two hundred fifty-six billion, six hundred two million, three hundred nineteen thousand, four hundred eighty-seven".