27245205645 has 48 divisors (see below), whose sum is σ = 50789188800. Its totient is φ = 12435365376.

The previous prime is 27245205643. The next prime is 27245205671. The reversal of 27245205645 is 54650254272.

It is not a de Polignac number, because 27245205645 - 2¹ = 27245205643 is a prime.

It is a super-3 number, since 3×27245205645³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27245205597 and 27245205606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27245205643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 443781 + ... + 501429.

It is an arithmetic number, because the mean of its divisors is an integer number (1058108100).

Almost surely, 2^27245205645 is an apocalyptic number.

It is an amenable number.

27245205645 is a deficient number, since it is larger than the sum of its proper divisors (23543983155).

27245205645 is a wasteful number, since it uses less digits than its factorization.

27245205645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58314 (or 58307 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 42.

The spelling of 27245205645 in words is "twenty-seven billion, two hundred forty-five million, two hundred five thousand, six hundred forty-five".