77278924768 has 24 divisors (see below), whose sum is σ = 161092465632. Its totient is φ = 36366552576.

The previous prime is 77278924763. The next prime is 77278924777. The reversal of 77278924768 is 86742987277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77278924763) 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, 71027880 + ... + 71028967.

It is an arithmetic number, because the mean of its divisors is an integer number (6712186068).

Almost surely, 2^77278924768 is an apocalyptic number.

It is an amenable number.

77278924768 is an abundant number, since it is smaller than the sum of its proper divisors (83813540864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77278924768 is a wasteful number, since it uses less digits than its factorization.

77278924768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142056874 (or 142056866 counting only the distinct ones).

The product of its digits is 132765696, while the sum is 67.

The spelling of 77278924768 in words is "seventy-seven billion, two hundred seventy-eight million, nine hundred twenty-four thousand, seven hundred sixty-eight".