256229770369 has 8 divisors (see below), whose sum is σ = 258287191040. Its totient is φ = 254172972816.

The previous prime is 256229770351. The next prime is 256229770397. The reversal of 256229770369 is 963077922652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256229770369 - 2¹³ = 256229762177 is a prime.

It is a super-2 number, since 2×256229770369² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256229770169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688207 + ... + 993019.

It is an arithmetic number, because the mean of its divisors is an integer number (32285898880).

Almost surely, 2^256229770369 is an apocalyptic number.

It is an amenable number.

256229770369 is a deficient number, since it is larger than the sum of its proper divisors (2057420671).

256229770369 is a wasteful number, since it uses less digits than its factorization.

256229770369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311559.

The product of its (nonzero) digits is 17146080, while the sum is 58.

The spelling of 256229770369 in words is "two hundred fifty-six billion, two hundred twenty-nine million, seven hundred seventy thousand, three hundred sixty-nine".