77038785342445 has 4 divisors (see below), whose sum is σ = 92446542410940. Its totient is φ = 61631028273952.

The previous prime is 77038785342443. The next prime is 77038785342473. The reversal of 77038785342445 is 54424358783077.

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 12823260197764 + 64215525144681 = 3580958^2 + 8013459^2 .

It is a cyclic number.

It is not a de Polignac number, because 77038785342445 - 2¹ = 77038785342443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77038785342443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7703878534240 + ... + 7703878534249.

It is an arithmetic number, because the mean of its divisors is an integer number (23111635602735).

Almost surely, 2^{77038785342445} is an apocalyptic number.

It is an amenable number.

77038785342445 is a deficient number, since it is larger than the sum of its proper divisors (15407757068495).

77038785342445 is a wasteful number, since it uses less digits than its factorization.

77038785342445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15407757068494.

The product of its (nonzero) digits is 632217600, while the sum is 67.

The spelling of 77038785342445 in words is "seventy-seven trillion, thirty-eight billion, seven hundred eighty-five million, three hundred forty-two thousand, four hundred forty-five".