77798693376 has 640 divisors, whose sum is σ = 254637630720. Its totient is φ = 23648993280.

The previous prime is 77798693369. The next prime is 77798693383. The reversal of 77798693376 is 67339689777.

It is an interprime number because it is at equal distance from previous prime (77798693369) and next prime (77798693383).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1161174495 + ... + 1161174561.

It is an arithmetic number, because the mean of its divisors is an integer number (397871298).

Almost surely, 2^77798693376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77798693376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127318815360).

77798693376 is an abundant number, since it is smaller than the sum of its proper divisors (176838937344).

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

77798693376 is an frugal number, since it uses more digits than its factorization.

77798693376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 150 counting only the distinct ones).

The product of its digits is 504094752, while the sum is 72.

The spelling of 77798693376 in words is "seventy-seven billion, seven hundred ninety-eight million, six hundred ninety-three thousand, three hundred seventy-six".