256335554725 has 6 divisors (see below), whose sum is σ = 317856087890. Its totient is φ = 205068443760.

The previous prime is 256335554723. The next prime is 256335554743. The reversal of 256335554725 is 527455533652.

It can be written as a sum of positive squares in 3 ways, for example, as 6277551361 + 250058003364 = 79231^2 + 500058^2 .

It is not a de Polignac number, because 256335554725 - 2¹ = 256335554723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256335554723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5126711070 + ... + 5126711119.

Almost surely, 2^256335554725 is an apocalyptic number.

256335554725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256335554725 is a deficient number, since it is larger than the sum of its proper divisors (61520533165).

256335554725 is a wasteful number, since it uses less digits than its factorization.

256335554725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10253422199 (or 10253422194 counting only the distinct ones).

The product of its digits is 18900000, while the sum is 52.

The spelling of 256335554725 in words is "two hundred fifty-six billion, three hundred thirty-five million, five hundred fifty-four thousand, seven hundred twenty-five".