77228820843 has 32 divisors (see below), whose sum is σ = 104993957376. Its totient is φ = 50485056768.

The previous prime is 77228820817. The next prime is 77228820887. The reversal of 77228820843 is 34802882277.

It is not a de Polignac number, because 77228820843 - 2¹⁰ = 77228819819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77228820043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45615705 + ... + 45617397.

It is an arithmetic number, because the mean of its divisors is an integer number (3281061168).

Almost surely, 2^77228820843 is an apocalyptic number.

77228820843 is a deficient number, since it is larger than the sum of its proper divisors (27765136533).

77228820843 is a wasteful number, since it uses less digits than its factorization.

77228820843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043.

The product of its (nonzero) digits is 2408448, while the sum is 51.

The spelling of 77228820843 in words is "seventy-seven billion, two hundred twenty-eight million, eight hundred twenty thousand, eight hundred forty-three".