84575457481 has 2 divisors, whose sum is σ = 84575457482. Its totient is φ = 84575457480.

The previous prime is 84575457437. The next prime is 84575457557. The reversal of 84575457481 is 18475457548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53488125625 + 31087331856 = 231275^2 + 176316^2 .

It is a cyclic number.

It is not a de Polignac number, because 84575457481 - 2⁹ = 84575456969 is a prime.

It is a super-2 number, since 2×84575457481² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84575457881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42287728740 + 42287728741.

It is an arithmetic number, because the mean of its divisors is an integer number (42287728741).

Almost surely, 2^84575457481 is an apocalyptic number.

It is an amenable number.

84575457481 is a deficient number, since it is larger than the sum of its proper divisors (1).

84575457481 is an equidigital number, since it uses as much as digits as its factorization.

84575457481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088000, while the sum is 58.

The spelling of 84575457481 in words is "eighty-four billion, five hundred seventy-five million, four hundred fifty-seven thousand, four hundred eighty-one".