257578238145 has 16 divisors (see below), whose sum is σ = 412255388160. Its totient is φ = 137331657984.

The previous prime is 257578238143. The next prime is 257578238153. The reversal of 257578238145 is 541832875752.

It is not a de Polignac number, because 257578238145 - 2¹ = 257578238143 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (257578238143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2663560 + ... + 2758569.

It is an arithmetic number, because the mean of its divisors is an integer number (25765961760).

Almost surely, 2^257578238145 is an apocalyptic number.

It is an amenable number.

257578238145 is a deficient number, since it is larger than the sum of its proper divisors (154677150015).

257578238145 is a wasteful number, since it uses less digits than its factorization.

257578238145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5425304.

The product of its digits is 18816000, while the sum is 57.

The spelling of 257578238145 in words is "two hundred fifty-seven billion, five hundred seventy-eight million, two hundred thirty-eight thousand, one hundred forty-five".