77640439514 has 8 divisors (see below), whose sum is σ = 127047991968. Its totient is φ = 35291108860.

The previous prime is 77640439511. The next prime is 77640439529. The reversal of 77640439514 is 41593404677.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (77640439511) 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 3 ways as a sum of consecutive naturals, for example, 1764555422 + ... + 1764555465.

It is an arithmetic number, because the mean of its divisors is an integer number (15880998996).

Almost surely, 2^77640439514 is an apocalyptic number.

77640439514 is a deficient number, since it is larger than the sum of its proper divisors (49407552454).

77640439514 is a wasteful number, since it uses less digits than its factorization.

77640439514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3529110900.

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 77640439514 in words is "seventy-seven billion, six hundred forty million, four hundred thirty-nine thousand, five hundred fourteen".