255778395 has 16 divisors (see below), whose sum is σ = 409646112. Its totient is φ = 136281600.

The previous prime is 255778387. The next prime is 255778403. The reversal of 255778395 is 593877552.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (255778387) and next prime (255778403).

It is not a de Polignac number, because 255778395 - 2³ = 255778387 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8595 + ... + 24195.

It is an arithmetic number, because the mean of its divisors is an integer number (25602882).

Almost surely, 2^255778395 is an apocalyptic number.

255778395 is a deficient number, since it is larger than the sum of its proper divisors (153867717).

255778395 is a wasteful number, since it uses less digits than its factorization.

255778395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16702.

The product of its digits is 2646000, while the sum is 51.

The square root of 255778395 is about 15993.0733444201. The cubic root of 255778395 is about 634.7771512231. Note that the first 3 decimals are identical.

The spelling of 255778395 in words is "two hundred fifty-five million, seven hundred seventy-eight thousand, three hundred ninety-five".