75639342377 has 4 divisors (see below), whose sum is σ = 80088715476. Its totient is φ = 71189969280.

The previous prime is 75639342329. The next prime is 75639342391. The reversal of 75639342377 is 77324393657.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27901025296 + 47738317081 = 167036^2 + 218491^2 .

It is a cyclic number.

It is not a de Polignac number, because 75639342377 - 2¹⁶ = 75639276841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75639342577) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2224686524 + ... + 2224686557.

It is an arithmetic number, because the mean of its divisors is an integer number (20022178869).

Almost surely, 2^75639342377 is an apocalyptic number.

It is an amenable number.

75639342377 is a deficient number, since it is larger than the sum of its proper divisors (4449373099).

75639342377 is a wasteful number, since it uses less digits than its factorization.

75639342377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4449373098.

The product of its digits is 20003760, while the sum is 56.

The spelling of 75639342377 in words is "seventy-five billion, six hundred thirty-nine million, three hundred forty-two thousand, three hundred seventy-seven".