256549341049 has 3 divisors (see below), whose sum is σ = 256549847557. Its totient is φ = 256548834542.

The previous prime is 256549341007. The next prime is 256549341077. The reversal of 256549341049 is 940143945652.

It is a happy number.

The square root of 256549341049 is 506507.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 256549341049 - 2²⁹ = 256012470137 is a prime.

It is a super-2 number, since 2×256549341049² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256549340987 and 256549341005.

It is not an unprimeable number, because it can be changed into a prime (256549341079) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 253254 + ... + 759760.

Almost surely, 2^256549341049 is an apocalyptic number.

256549341049 is the 506507-th square number.

256549341049 is the 253254-th centered octagonal number.

It is an amenable number.

256549341049 is a deficient number, since it is larger than the sum of its proper divisors (506508).

256549341049 is an frugal number, since it uses more digits than its factorization.

256549341049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013014 (or 506507 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 256549341049 in words is "two hundred fifty-six billion, five hundred forty-nine million, three hundred forty-one thousand, forty-nine".