255957779 has 8 divisors (see below), whose sum is σ = 319116288. Its totient is φ = 199447560.

The previous prime is 255957761. The next prime is 255957787. The reversal of 255957779 is 977759552.

255957779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255957779 is a prime.

It is a super-2 number, since 2×255957779² = 131028769261225682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255957719) 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, 1661987 + ... + 1662140.

It is an arithmetic number, because the mean of its divisors is an integer number (39889536).

Almost surely, 2^255957779 is an apocalyptic number.

255957779 is a deficient number, since it is larger than the sum of its proper divisors (63158509).

255957779 is a wasteful number, since it uses less digits than its factorization.

255957779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3324145.

The product of its digits is 6945750, while the sum is 56.

The square root of 255957779 is about 15998.6805393445. The cubic root of 255957779 is about 634.9255117536.

The spelling of 255957779 in words is "two hundred fifty-five million, nine hundred fifty-seven thousand, seven hundred seventy-nine".