5181768138477 has 16 divisors (see below), whose sum is σ = 8057171062400. Its totient is φ = 2961010364256.

The previous prime is 5181768138467. The next prime is 5181768138509. The reversal of 5181768138477 is 7748318671815.

It is not a de Polignac number, because 5181768138477 - 2⁴ = 5181768138461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5181768138457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2517864928 + ... + 2517866985.

It is an arithmetic number, because the mean of its divisors is an integer number (503573191400).

Almost surely, 2^{5181768138477} is an apocalyptic number.

It is an amenable number.

5181768138477 is a deficient number, since it is larger than the sum of its proper divisors (2875402923923).

5181768138477 is an equidigital number, since it uses as much as digits as its factorization.

5181768138477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5035731937 (or 5035731923 counting only the distinct ones).

The product of its digits is 63221760, while the sum is 66.

The spelling of 5181768138477 in words is "five trillion, one hundred eighty-one billion, seven hundred sixty-eight million, one hundred thirty-eight thousand, four hundred seventy-seven".