77788671533607 has 4 divisors (see below), whose sum is σ = 103718228711480. Its totient is φ = 51859114355736.

The previous prime is 77788671533549. The next prime is 77788671533689. The reversal of 77788671533607 is 70633517688777.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 77788671533607 - 2⁷ = 77788671533479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77788671533707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12964778588932 + ... + 12964778588937.

It is an arithmetic number, because the mean of its divisors is an integer number (25929557177870).

Almost surely, 2^{77788671533607} is an apocalyptic number.

77788671533607 is a deficient number, since it is larger than the sum of its proper divisors (25929557177873).

77788671533607 is a wasteful number, since it uses less digits than its factorization.

77788671533607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25929557177872.

The product of its (nonzero) digits is 1742549760, while the sum is 75.

The spelling of 77788671533607 in words is "seventy-seven trillion, seven hundred eighty-eight billion, six hundred seventy-one million, five hundred thirty-three thousand, six hundred seven".