257575070517 has 8 divisors (see below), whose sum is σ = 351420251424. Its totient is φ = 167723301648.

The previous prime is 257575070509. The next prime is 257575070531. The reversal of 257575070517 is 715070575752.

It is a happy number.

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

It is not a de Polignac number, because 257575070517 - 2³ = 257575070509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 257575070517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257575070537) 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, 998352858 + ... + 998353115.

It is an arithmetic number, because the mean of its divisors is an integer number (43927531428).

Almost surely, 2^257575070517 is an apocalyptic number.

It is an amenable number.

257575070517 is a deficient number, since it is larger than the sum of its proper divisors (93845180907).

257575070517 is a wasteful number, since it uses less digits than its factorization.

257575070517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996706019.

The product of its (nonzero) digits is 3001250, while the sum is 51.

The spelling of 257575070517 in words is "two hundred fifty-seven billion, five hundred seventy-five million, seventy thousand, five hundred seventeen".