256004353503 has 12 divisors (see below), whose sum is σ = 369811253448. Its totient is φ = 170657021040.

The previous prime is 256004353453. The next prime is 256004353559. The reversal of 256004353503 is 305353400652.

256004353503 is a `hidden beast` number, since 2 + 5 + 60 + 0 + 43 + 53 + 503 = 666.

It is not a de Polignac number, because 256004353503 - 2¹⁷ = 256004222431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256004354503) 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, 915600 + ... + 1162037.

It is an arithmetic number, because the mean of its divisors is an integer number (30817604454).

Almost surely, 2^256004353503 is an apocalyptic number.

256004353503 is a deficient number, since it is larger than the sum of its proper divisors (113806899945).

256004353503 is a wasteful number, since it uses less digits than its factorization.

256004353503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091334 (or 2091331 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 36.

The spelling of 256004353503 in words is "two hundred fifty-six billion, four million, three hundred fifty-three thousand, five hundred three".