57145521842 has 4 divisors (see below), whose sum is σ = 85718282766. Its totient is φ = 28572760920.

The previous prime is 57145521803. The next prime is 57145521857. The reversal of 57145521842 is 24812554175.

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 only one way, i.e., 49599298681 + 7546223161 = 222709^2 + 86869^2 .

It is a super-3 number, since 3×57145521842³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 57145521793 and 57145521802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14286380459 + ... + 14286380462.

Almost surely, 2^57145521842 is an apocalyptic number.

57145521842 is a deficient number, since it is larger than the sum of its proper divisors (28572760924).

57145521842 is a wasteful number, since it uses less digits than its factorization.

57145521842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28572760923.

The product of its digits is 448000, while the sum is 44.

The spelling of 57145521842 in words is "fifty-seven billion, one hundred forty-five million, five hundred twenty-one thousand, eight hundred forty-two".