256123465011 has 12 divisors (see below), whose sum is σ = 389427490920. Its totient is φ = 161762188320.

The previous prime is 256123464917. The next prime is 256123465033. The reversal of 256123465011 is 110564321652.

256123465011 is a `hidden beast` number, since 2 + 5 + 612 + 34 + 6 + 5 + 0 + 1 + 1 = 666.

It is not a de Polignac number, because 256123465011 - 2¹¹ = 256123462963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256123485011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 748898850 + ... + 748899191.

It is an arithmetic number, because the mean of its divisors is an integer number (32452290910).

Almost surely, 2^256123465011 is an apocalyptic number.

256123465011 is a deficient number, since it is larger than the sum of its proper divisors (133304025909).

256123465011 is a wasteful number, since it uses less digits than its factorization.

256123465011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497798066 (or 1497798063 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

Adding to 256123465011 its reverse (110564321652), we get a palindrome (366687786663).

The spelling of 256123465011 in words is "two hundred fifty-six billion, one hundred twenty-three million, four hundred sixty-five thousand, eleven".