255305710405 has 16 divisors (see below), whose sum is σ = 325559539440. Its totient is φ = 191536192512.

The previous prime is 255305710399. The next prime is 255305710409. The reversal of 255305710405 is 504017503552.

It can be written as a sum of positive squares in 8 ways, for example, as 1433833956 + 253871876449 = 37866^2 + 503857^2 .

It is a cyclic number.

It is not a de Polignac number, because 255305710405 - 2¹⁵ = 255305677637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255305710409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5398110 + ... + 5445199.

It is an arithmetic number, because the mean of its divisors is an integer number (20347471215).

Almost surely, 2^255305710405 is an apocalyptic number.

It is an amenable number.

255305710405 is a deficient number, since it is larger than the sum of its proper divisors (70253829035).

255305710405 is a wasteful number, since it uses less digits than its factorization.

255305710405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10843608.

The product of its (nonzero) digits is 105000, while the sum is 37.

The spelling of 255305710405 in words is "two hundred fifty-five billion, three hundred five million, seven hundred ten thousand, four hundred five".