77432836086820 has 12 divisors (see below), whose sum is σ = 162608955782364. Its totient is φ = 30973134434720.

The previous prime is 77432836086797. The next prime is 77432836086839. The reversal of 77432836086820 is 2868063823477.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16723306863396 + 60709529223424 = 4089414^2 + 7791632^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1935820902151 + ... + 1935820902190.

It is an arithmetic number, because the mean of its divisors is an integer number (13550746315197).

Almost surely, 2^{77432836086820} is an apocalyptic number.

It is an amenable number.

77432836086820 is an abundant number, since it is smaller than the sum of its proper divisors (85176119695544).

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

77432836086820 is a wasteful number, since it uses less digits than its factorization.

77432836086820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3871641804350 (or 3871641804348 counting only the distinct ones).

The product of its (nonzero) digits is 130056192, while the sum is 64.

The spelling of 77432836086820 in words is "seventy-seven trillion, four hundred thirty-two billion, eight hundred thirty-six million, eighty-six thousand, eight hundred twenty".