4540139081 has 2 divisors, whose sum is σ = 4540139082. Its totient is φ = 4540139080.

The previous prime is 4540139077. The next prime is 4540139083. The reversal of 4540139081 is 1809310454.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3804915856 + 735223225 = 61684^2 + 27115^2 .

It is a cyclic number.

It is not a de Polignac number, because 4540139081 - 2² = 4540139077 is a prime.

It is a super-2 number, since 2×4540139081² = 41225725749647049122, which contains 22 as substring.

Together with 4540139083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4540139083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2270069540 + 2270069541.

It is an arithmetic number, because the mean of its divisors is an integer number (2270069541).

Almost surely, 2^4540139081 is an apocalyptic number.

It is an amenable number.

4540139081 is a deficient number, since it is larger than the sum of its proper divisors (1).

4540139081 is an equidigital number, since it uses as much as digits as its factorization.

4540139081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 4540139081 is about 67380.5541755186. The cubic root of 4540139081 is about 1655.8578541096.

The spelling of 4540139081 in words is "four billion, five hundred forty million, one hundred thirty-nine thousand, eighty-one".