77617755113 has 4 divisors (see below), whose sum is σ = 77618957700. Its totient is φ = 77616552528.

The previous prime is 77617755107. The next prime is 77617755121. The reversal of 77617755113 is 31155771677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31155771677 = 1249 ⋅24944573.

It can be written as a sum of positive squares in 2 ways, for example, as 61728396304 + 15889358809 = 248452^2 + 126053^2 .

It is a cyclic number.

It is not a de Polignac number, because 77617755113 - 2³² = 73322787817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77617755013) 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, 498638 + ... + 635511.

It is an arithmetic number, because the mean of its divisors is an integer number (19404739425).

Almost surely, 2^77617755113 is an apocalyptic number.

It is an amenable number.

77617755113 is a deficient number, since it is larger than the sum of its proper divisors (1202587).

77617755113 is a wasteful number, since it uses less digits than its factorization.

77617755113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202586.

The product of its digits is 1080450, while the sum is 50.

The spelling of 77617755113 in words is "seventy-seven billion, six hundred seventeen million, seven hundred fifty-five thousand, one hundred thirteen".