77338543745 has 8 divisors (see below), whose sum is σ = 95069819880. Its totient is φ = 60361790080.

The previous prime is 77338543729. The next prime is 77338543747. The reversal of 77338543745 is 54734583377.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 746874241 + 76591669504 = 27329^2 + 276752^2 .

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

It is not a de Polignac number, because 77338543745 - 2⁴ = 77338543729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77338543747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188630390 + ... + 188630799.

It is an arithmetic number, because the mean of its divisors is an integer number (11883727485).

Almost surely, 2^77338543745 is an apocalyptic number.

It is an amenable number.

77338543745 is a deficient number, since it is larger than the sum of its proper divisors (17731276135).

77338543745 is a wasteful number, since it uses less digits than its factorization.

77338543745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377261235.

The product of its digits is 29635200, while the sum is 56.

The spelling of 77338543745 in words is "seventy-seven billion, three hundred thirty-eight million, five hundred forty-three thousand, seven hundred forty-five".