256923571611 has 16 divisors (see below), whose sum is σ = 396458316800. Its totient is φ = 144955070208.

The previous prime is 256923571571. The next prime is 256923571631. The reversal of 256923571611 is 116175329652.

It is not a de Polignac number, because 256923571611 - 2⁶ = 256923571547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256923571631) by changing a digit.

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, 77431606 + ... + 77434923.

It is an arithmetic number, because the mean of its divisors is an integer number (24778644800).

Almost surely, 2^256923571611 is an apocalyptic number.

256923571611 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

256923571611 is a deficient number, since it is larger than the sum of its proper divisors (139534745189).

256923571611 is a wasteful number, since it uses less digits than its factorization.

256923571611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154866618.

The product of its digits is 680400, while the sum is 48.

The spelling of 256923571611 in words is "two hundred fifty-six billion, nine hundred twenty-three million, five hundred seventy-one thousand, six hundred eleven".