77117871804 has 144 divisors (see below), whose sum is σ = 197105126400. Its totient is φ = 23435976960.

The previous prime is 77117871793. The next prime is 77117871829. The reversal of 77117871804 is 40817871177.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13181872 + ... + 13187720.

It is an arithmetic number, because the mean of its divisors is an integer number (1368785600).

Almost surely, 2^77117871804 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 77117871804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98552563200).

77117871804 is an abundant number, since it is smaller than the sum of its proper divisors (119987254596).

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

77117871804 is a wasteful number, since it uses less digits than its factorization.

77117871804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000 (or 5975 counting only the distinct ones).

The product of its (nonzero) digits is 614656, while the sum is 51.

The spelling of 77117871804 in words is "seventy-seven billion, one hundred seventeen million, eight hundred seventy-one thousand, eight hundred four".