77605986093 has 4 divisors (see below), whose sum is σ = 103474648128. Its totient is φ = 51737324060.

The previous prime is 77605986091. The next prime is 77605986193. The reversal of 77605986093 is 39068950677.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39068950677 = 3 ⋅13022983559.

It is a cyclic number.

It is not a de Polignac number, because 77605986093 - 2¹ = 77605986091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77605986091) 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, 12934331013 + ... + 12934331018.

It is an arithmetic number, because the mean of its divisors is an integer number (25868662032).

Almost surely, 2^77605986093 is an apocalyptic number.

It is an amenable number.

77605986093 is a deficient number, since it is larger than the sum of its proper divisors (25868662035).

77605986093 is a wasteful number, since it uses less digits than its factorization.

77605986093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25868662034.

The product of its (nonzero) digits is 17146080, while the sum is 60.

The spelling of 77605986093 in words is "seventy-seven billion, six hundred five million, nine hundred eighty-six thousand, ninety-three".