255419309257 has 24 divisors (see below), whose sum is σ = 308114328704. Its totient is φ = 207378667584.

The previous prime is 255419309239. The next prime is 255419309269. The reversal of 255419309257 is 752903914552.

It is a happy number.

It is not a de Polignac number, because 255419309257 - 2²³ = 255410920649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255419309357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46573 + ... + 716245.

Almost surely, 2^255419309257 is an apocalyptic number.

It is an amenable number.

255419309257 is a deficient number, since it is larger than the sum of its proper divisors (52695019447).

255419309257 is a wasteful number, since it uses less digits than its factorization.

255419309257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669829 (or 669806 counting only the distinct ones).

The product of its (nonzero) digits is 3402000, while the sum is 52.

The spelling of 255419309257 in words is "two hundred fifty-five billion, four hundred nineteen million, three hundred nine thousand, two hundred fifty-seven".