5181506988 has 24 divisors (see below), whose sum is σ = 13817352192. Its totient is φ = 1480430544.

The previous prime is 5181506987. The next prime is 5181507007. The reversal of 5181506988 is 8896051815.

It is a self number, because there is not a number n which added to its sum of digits gives 5181506988.

It is not an unprimeable number, because it can be changed into a prime (5181506983) 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 7 ways as a sum of consecutive naturals, for example, 30842220 + ... + 30842387.

It is an arithmetic number, because the mean of its divisors is an integer number (575723008).

Almost surely, 2^5181506988 is an apocalyptic number.

It is an amenable number.

5181506988 is an abundant number, since it is smaller than the sum of its proper divisors (8635845204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5181506988 is a wasteful number, since it uses less digits than its factorization.

5181506988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61684621 (or 61684619 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 51.

The square root of 5181506988 is about 71982.6853347387. The cubic root of 5181506988 is about 1730.4220058186.

The spelling of 5181506988 in words is "five billion, one hundred eighty-one million, five hundred six thousand, nine hundred eighty-eight".