257386056513 has 8 divisors (see below), whose sum is σ = 343193424768. Its totient is φ = 171584696304.

The previous prime is 257386056503. The next prime is 257386056533. The reversal of 257386056513 is 315650683752.

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

It is not a de Polignac number, because 257386056513 - 2¹³ = 257386048321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257386056503) 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, 1401081 + ... + 1574102.

It is an arithmetic number, because the mean of its divisors is an integer number (42899178096).

Almost surely, 2^257386056513 is an apocalyptic number.

It is an amenable number.

257386056513 is a deficient number, since it is larger than the sum of its proper divisors (85807368255).

257386056513 is a wasteful number, since it uses less digits than its factorization.

257386056513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3004023.

The product of its (nonzero) digits is 4536000, while the sum is 51.

The spelling of 257386056513 in words is "two hundred fifty-seven billion, three hundred eighty-six million, fifty-six thousand, five hundred thirteen".