27277145420645 has 16 divisors (see below), whose sum is σ = 34361149847040. Its totient is φ = 20759861352000.

The previous prime is 27277145420633. The next prime is 27277145420773. The reversal of 27277145420645 is 54602454177272.

It is not a de Polignac number, because 27277145420645 - 2¹⁰ = 27277145419621 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1491360206 + ... + 1491378495.

It is an arithmetic number, because the mean of its divisors is an integer number (2147571865440).

Almost surely, 2^{27277145420645} is an apocalyptic number.

It is an amenable number.

27277145420645 is a deficient number, since it is larger than the sum of its proper divisors (7084004426395).

27277145420645 is a wasteful number, since it uses less digits than its factorization.

27277145420645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2982738796.

The product of its (nonzero) digits is 26342400, while the sum is 56.

The spelling of 27277145420645 in words is "twenty-seven trillion, two hundred seventy-seven billion, one hundred forty-five million, four hundred twenty thousand, six hundred forty-five".