77908830534 has 80 divisors (see below), whose sum is σ = 182320380000. Its totient is φ = 24819125760.

The previous prime is 77908830491. The next prime is 77908830541. The reversal of 77908830534 is 43503880977.

77908830534 is a `hidden beast` number, since 7 + 79 + 0 + 8 + 8 + 30 + 534 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4645404 + ... + 4662144.

It is an arithmetic number, because the mean of its divisors is an integer number (2279004750).

Almost surely, 2^77908830534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77908830534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91160190000).

77908830534 is an abundant number, since it is smaller than the sum of its proper divisors (104411549466).

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

77908830534 is a wasteful number, since it uses less digits than its factorization.

77908830534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18027 (or 18018 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 77908830534 in words is "seventy-seven billion, nine hundred eight million, eight hundred thirty thousand, five hundred thirty-four".