256010154409 has 4 divisors (see below), whose sum is σ = 256022862804. Its totient is φ = 255997446016.

The previous prime is 256010154391. The next prime is 256010154437. The reversal of 256010154409 is 904451010652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87056272809 + 168953881600 = 295053^2 + 411040^2 .

It is a cyclic number.

It is not a de Polignac number, because 256010154409 - 2⁵ = 256010154377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256010154709) 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, 6323932 + ... + 6364285.

It is an arithmetic number, because the mean of its divisors is an integer number (64005715701).

Almost surely, 2^256010154409 is an apocalyptic number.

It is an amenable number.

256010154409 is a deficient number, since it is larger than the sum of its proper divisors (12708395).

256010154409 is a wasteful number, since it uses less digits than its factorization.

256010154409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12708394.

The product of its (nonzero) digits is 43200, while the sum is 37.

It can be divided in two parts, 2560 and 10154409, that added together give a square (10156969 = 3187²).

The spelling of 256010154409 in words is "two hundred fifty-six billion, ten million, one hundred fifty-four thousand, four hundred nine".