57148395449 has 4 divisors (see below), whose sum is σ = 57158904180. Its totient is φ = 57137886720.

The previous prime is 57148395391. The next prime is 57148395461. The reversal of 57148395449 is 94459384175.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17051136400 + 40097259049 = 130580^2 + 200243^2 .

It is a cyclic number.

It is not a de Polignac number, because 57148395449 - 2²⁰ = 57147346873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57148395349) 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, 5246204 + ... + 5257085.

It is an arithmetic number, because the mean of its divisors is an integer number (14289726045).

Almost surely, 2^57148395449 is an apocalyptic number.

It is an amenable number.

57148395449 is a deficient number, since it is larger than the sum of its proper divisors (10508731).

57148395449 is a wasteful number, since it uses less digits than its factorization.

57148395449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10508730.

The product of its digits is 21772800, while the sum is 59.

The spelling of 57148395449 in words is "fifty-seven billion, one hundred forty-eight million, three hundred ninety-five thousand, four hundred forty-nine".