257210146036447 has 4 divisors (see below), whose sum is σ = 259707331920400. Its totient is φ = 254712960152496.

The previous prime is 257210146036357. The next prime is 257210146036463. The reversal of 257210146036447 is 744630641012752.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257210146036447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257210146036394 and 257210146036403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257210146033447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1248592941822 + ... + 1248592942027.

It is an arithmetic number, because the mean of its divisors is an integer number (64926832980100).

Almost surely, 2^{257210146036447} is an apocalyptic number.

257210146036447 is a deficient number, since it is larger than the sum of its proper divisors (2497185883953).

257210146036447 is a wasteful number, since it uses less digits than its factorization.

257210146036447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497185883952.

The product of its (nonzero) digits is 6773760, while the sum is 52.

The spelling of 257210146036447 in words is "two hundred fifty-seven trillion, two hundred ten billion, one hundred forty-six million, thirty-six thousand, four hundred forty-seven".