257293596745 has 8 divisors (see below), whose sum is σ = 314577831816. Its totient is φ = 201951200256.

The previous prime is 257293596743. The next prime is 257293596751. The reversal of 257293596745 is 547695392752.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21284183881 + 236009412864 = 145891^2 + 485808^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 257293596745 - 2¹ = 257293596743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257293596743) 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, 485459352 + ... + 485459881.

It is an arithmetic number, because the mean of its divisors is an integer number (39322228977).

Almost surely, 2^257293596745 is an apocalyptic number.

It is an amenable number.

257293596745 is a deficient number, since it is larger than the sum of its proper divisors (57284235071).

257293596745 is an equidigital number, since it uses as much as digits as its factorization.

257293596745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970919291.

The product of its digits is 142884000, while the sum is 64.

The spelling of 257293596745 in words is "two hundred fifty-seven billion, two hundred ninety-three million, five hundred ninety-six thousand, seven hundred forty-five".