57145521850 has 12 divisors (see below), whose sum is σ = 106290670734. Its totient is φ = 22858208720.

The previous prime is 57145521803. The next prime is 57145521857. The reversal of 57145521850 is 5812554175.

It can be written as a sum of positive squares in 3 ways, for example, as 41546261241 + 15599260609 = 203829^2 + 124897^2 .

It is a super-2 number, since 2×57145521850² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 57145521797 and 57145521806.

It is not an unprimeable number, because it can be changed into a prime (57145521857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 571455169 + ... + 571455268.

Almost surely, 2^57145521850 is an apocalyptic number.

57145521850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

57145521850 is a deficient number, since it is larger than the sum of its proper divisors (49145148884).

57145521850 is a wasteful number, since it uses less digits than its factorization.

57145521850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142910449 (or 1142910444 counting only the distinct ones).

The product of its (nonzero) digits is 280000, while the sum is 43.

The spelling of 57145521850 in words is "fifty-seven billion, one hundred forty-five million, five hundred twenty-one thousand, eight hundred fifty".