77810583852 has 72 divisors (see below), whose sum is σ = 204332528400. Its totient is φ = 25891094016.

The previous prime is 77810583833. The next prime is 77810583859. The reversal of 77810583852 is 25838501877.

77810583852 is a `hidden beast` number, since 7 + 7 + 8 + 1 + 0 + 583 + 8 + 52 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (77810583859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 482724 + ... + 623412.

Almost surely, 2^77810583852 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 77810583852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102166264200).

77810583852 is an abundant number, since it is smaller than the sum of its proper divisors (126521944548).

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

77810583852 is a wasteful number, since it uses less digits than its factorization.

77810583852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141277 (or 141263 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 54.

The spelling of 77810583852 in words is "seventy-seven billion, eight hundred ten million, five hundred eighty-three thousand, eight hundred fifty-two".