77429782242 has 18 divisors (see below), whose sum is σ = 167767086123. Its totient is φ = 25809533892.

The previous prime is 77429782219. The next prime is 77429782253. The reversal of 77429782242 is 24228792477.

It can be written as a sum of positive squares in only one way, i.e., 38714891121 + 38714891121 = 196761^2 + 196761^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=196761.

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 8 ways as a sum of consecutive naturals, for example, 1147773 + ... + 1213359.

Almost surely, 2^77429782242 is an apocalyptic number.

77429782242 is an abundant number, since it is smaller than the sum of its proper divisors (90337303881).

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

77429782242 is an frugal number, since it uses more digits than its factorization.

77429782242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131182 (or 65592 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 54.

The spelling of 77429782242 in words is "seventy-seven billion, four hundred twenty-nine million, seven hundred eighty-two thousand, two hundred forty-two".