77283428278 has 24 divisors (see below), whose sum is σ = 136241936712. Its totient is φ = 32780006784.

The previous prime is 77283428239. The next prime is 77283428297. The reversal of 77283428278 is 87282438277.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4055476 + ... + 4074487.

It is an arithmetic number, because the mean of its divisors is an integer number (5676747363).

Almost surely, 2^77283428278 is an apocalyptic number.

77283428278 is a deficient number, since it is larger than the sum of its proper divisors (58958508434).

77283428278 is a wasteful number, since it uses less digits than its factorization.

77283428278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8130076 (or 8130069 counting only the distinct ones).

The product of its digits is 16859136, while the sum is 58.

Subtracting 77283428278 from its reverse (87282438277), we obtain a palindrome (9999009999).

The spelling of 77283428278 in words is "seventy-seven billion, two hundred eighty-three million, four hundred twenty-eight thousand, two hundred seventy-eight".