77117871853 has 4 divisors (see below), whose sum is σ = 84128587488. Its totient is φ = 70107156220.

The previous prime is 77117871829. The next prime is 77117871863. The reversal of 77117871853 is 35817871177.

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.

It is a cyclic number.

It is not a de Polignac number, because 77117871853 - 2¹³ = 77117863661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77117871794 and 77117871803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77117871863) 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, 3505357801 + ... + 3505357822.

It is an arithmetic number, because the mean of its divisors is an integer number (21032146872).

Almost surely, 2^77117871853 is an apocalyptic number.

It is an amenable number.

77117871853 is a deficient number, since it is larger than the sum of its proper divisors (7010715635).

77117871853 is a wasteful number, since it uses less digits than its factorization.

77117871853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7010715634.

The product of its digits is 2304960, while the sum is 55.

The spelling of 77117871853 in words is "seventy-seven billion, one hundred seventeen million, eight hundred seventy-one thousand, eight hundred fifty-three".