256340061603 has 12 divisors (see below), whose sum is σ = 370976955960. Its totient is φ = 170566615296.

The previous prime is 256340061563. The next prime is 256340061617. The reversal of 256340061603 is 306160043652.

256340061603 is a `hidden beast` number, since 2 + 5 + 6 + 3 + 40 + 0 + 6 + 1 + 603 = 666.

It is not a de Polignac number, because 256340061603 - 2⁶ = 256340061539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256340061683) 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, 27224958 + ... + 27234371.

It is an arithmetic number, because the mean of its divisors is an integer number (30914746330).

Almost surely, 2^256340061603 is an apocalyptic number.

256340061603 is a deficient number, since it is larger than the sum of its proper divisors (114636894357).

256340061603 is a wasteful number, since it uses less digits than its factorization.

256340061603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54459858 (or 54459855 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 256340061603 in words is "two hundred fifty-six billion, three hundred forty million, sixty-one thousand, six hundred three".