57145519481 has 2 divisors, whose sum is σ = 57145519482. Its totient is φ = 57145519480.

The previous prime is 57145519471. The next prime is 57145519577. The reversal of 57145519481 is 18491554175.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49510255081 + 7635264400 = 222509^2 + 87380^2 .

It is a cyclic number.

It is not a de Polignac number, because 57145519481 - 2¹⁴ = 57145503097 is a prime.

It is a super-2 number, since 2×57145519481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57145519471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28572759740 + 28572759741.

It is an arithmetic number, because the mean of its divisors is an integer number (28572759741).

Almost surely, 2^57145519481 is an apocalyptic number.

It is an amenable number.

57145519481 is a deficient number, since it is larger than the sum of its proper divisors (1).

57145519481 is an equidigital number, since it uses as much as digits as its factorization.

57145519481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008000, while the sum is 50.

The spelling of 57145519481 in words is "fifty-seven billion, one hundred forty-five million, five hundred nineteen thousand, four hundred eighty-one".