77986629396 has 288 divisors, whose sum is σ = 229657559040. Its totient is φ = 22100262912.

The previous prime is 77986629373. The next prime is 77986629397. The reversal of 77986629396 is 69392668977.

77986629396 is a `hidden beast` number, since 77 + 98 + 66 + 29 + 396 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77986629397) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 79822060 + ... + 79823036.

It is an arithmetic number, because the mean of its divisors is an integer number (797422080).

Almost surely, 2^77986629396 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 77986629396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114828779520).

77986629396 is an abundant number, since it is smaller than the sum of its proper divisors (151670929644).

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

77986629396 is a wasteful number, since it uses less digits than its factorization.

77986629396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223 (or 1218 counting only the distinct ones).

The product of its digits is 370355328, while the sum is 72.

The spelling of 77986629396 in words is "seventy-seven billion, nine hundred eighty-six million, six hundred twenty-nine thousand, three hundred ninety-six".