57451775481 has 27 divisors (see below), whose sum is σ = 83868639309. Its totient is φ = 37898023392.

The previous prime is 57451775461. The next prime is 57451775533. The reversal of 57451775481 is 18457715475.

It is a happy number.

The square root of 57451775481 is 239691.

It is a perfect power (a square), and thus also a powerful number.

57451775481 is a `hidden beast` number, since 5 + 74 + 517 + 7 + 54 + 8 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 31856895225 + 25594880256 = 178485^2 + 159984^2 .

It is a de Polignac number, because none of the positive numbers 2^k-57451775481 is a prime.

It is a super-2 number, since 2×57451775481² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57451775441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 78378591 + ... + 78379323.

Almost surely, 2^57451775481 is an apocalyptic number.

57451775481 is the 239691-st square number.

57451775481 is the 119846-th centered octagonal number.

It is an amenable number.

57451775481 is a deficient number, since it is larger than the sum of its proper divisors (26416863828).

57451775481 is an frugal number, since it uses more digits than its factorization.

57451775481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690 (or 845 counting only the distinct ones).

The product of its digits is 5488000, while the sum is 54.

The spelling of 57451775481 in words is "fifty-seven billion, four hundred fifty-one million, seven hundred seventy-five thousand, four hundred eighty-one".