77645006227 has 4 divisors (see below), whose sum is σ = 78738597936. Its totient is φ = 76551414520.

The previous prime is 77645006207. The next prime is 77645006233. The reversal of 77645006227 is 72260054677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72260054677 = 5651 ⋅12787127.

It is a cyclic number.

It is not a de Polignac number, because 77645006227 - 2⁷ = 77645006099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77645006207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546795748 + ... + 546795889.

It is an arithmetic number, because the mean of its divisors is an integer number (19684649484).

Almost surely, 2^77645006227 is an apocalyptic number.

77645006227 is a deficient number, since it is larger than the sum of its proper divisors (1093591709).

77645006227 is a wasteful number, since it uses less digits than its factorization.

77645006227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093591708.

The product of its (nonzero) digits is 987840, while the sum is 46.

The spelling of 77645006227 in words is "seventy-seven billion, six hundred forty-five million, six thousand, two hundred twenty-seven".