256521577006 has 8 divisors (see below), whose sum is σ = 386776057104. Its totient is φ = 127596224640.

The previous prime is 256521577003. The next prime is 256521577021. The reversal of 256521577006 is 600775125652.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256521577003) 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, 332281450 + ... + 332282221.

It is an arithmetic number, because the mean of its divisors is an integer number (48347007138).

Almost surely, 2^256521577006 is an apocalyptic number.

256521577006 is a deficient number, since it is larger than the sum of its proper divisors (130254480098).

256521577006 is a wasteful number, since it uses less digits than its factorization.

256521577006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664563866.

The product of its (nonzero) digits is 882000, while the sum is 46.

The spelling of 256521577006 in words is "two hundred fifty-six billion, five hundred twenty-one million, five hundred seventy-seven thousand, six".