545081639 has 2 divisors, whose sum is σ = 545081640. Its totient is φ = 545081638.

The previous prime is 545081629. The next prime is 545081731. The reversal of 545081639 is 936180545.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 545081639 - 2¹² = 545077543 is a prime.

It is a super-2 number, since 2×545081639² = 594227986349852642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 545081596 and 545081605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545081609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272540819 + 272540820.

It is an arithmetic number, because the mean of its divisors is an integer number (272540820).

Almost surely, 2^545081639 is an apocalyptic number.

545081639 is a deficient number, since it is larger than the sum of its proper divisors (1).

545081639 is an equidigital number, since it uses as much as digits as its factorization.

545081639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 545081639 is about 23346.9835096528. The cubic root of 545081639 is about 816.8717010853.

The spelling of 545081639 in words is "five hundred forty-five million, eighty-one thousand, six hundred thirty-nine".