5181085787 has 4 divisors (see below), whose sum is σ = 5181236376. Its totient is φ = 5180935200.

The previous prime is 5181085771. The next prime is 5181085859. The reversal of 5181085787 is 7875801815.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 5181085787 - 2⁴ = 5181085771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5181085717) 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, 4508 + ... + 101894.

It is an arithmetic number, because the mean of its divisors is an integer number (1295309094).

Almost surely, 2^5181085787 is an apocalyptic number.

5181085787 is a deficient number, since it is larger than the sum of its proper divisors (150589).

5181085787 is an equidigital number, since it uses as much as digits as its factorization.

5181085787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150588.

The product of its (nonzero) digits is 627200, while the sum is 50.

The square root of 5181085787 is about 71979.7595647554. The cubic root of 5181085787 is about 1730.3751162920.

The spelling of 5181085787 in words is "five billion, one hundred eighty-one million, eighty-five thousand, seven hundred eighty-seven".