255685229397 has 32 divisors (see below), whose sum is σ = 413518985600. Its totient is φ = 155189333376.

The previous prime is 255685229333. The next prime is 255685229413. The reversal of 255685229397 is 793922586552.

255685229397 is a `hidden beast` number, since 2 + 556 + 8 + 52 + 29 + 3 + 9 + 7 = 666.

It is not a de Polignac number, because 255685229397 - 2⁶ = 255685229333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255685209397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4963747 + ... + 5014992.

It is an arithmetic number, because the mean of its divisors is an integer number (12922468300).

Almost surely, 2^255685229397 is an apocalyptic number.

255685229397 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

255685229397 is a deficient number, since it is larger than the sum of its proper divisors (157833756203).

255685229397 is a wasteful number, since it uses less digits than its factorization.

255685229397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9978834 (or 9978828 counting only the distinct ones).

The product of its digits is 81648000, while the sum is 63.

The spelling of 255685229397 in words is "two hundred fifty-five billion, six hundred eighty-five million, two hundred twenty-nine thousand, three hundred ninety-seven".