8187485780 has 18 divisors (see below), whose sum is σ = 17194569966. Its totient is φ = 3274832448.

The previous prime is 8187485773. The next prime is 8187485849. The reversal of 8187485780 is 875847818.

It can be written as a sum of positive squares in 3 ways, for example, as 928786576 + 7258699204 = 30476^2 + 85198^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 394544 + ... + 414776.

It is an arithmetic number, because the mean of its divisors is an integer number (955253887).

Almost surely, 2^8187485780 is an apocalyptic number.

It is an amenable number.

8187485780 is an abundant number, since it is smaller than the sum of its proper divisors (9007084186).

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

8187485780 is an frugal number, since it uses more digits than its factorization.

8187485780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40475 (or 20240 counting only the distinct ones).

The product of its (nonzero) digits is 4014080, while the sum is 56.

The square root of 8187485780 is about 90484.7267775065. The cubic root of 8187485780 is about 2015.5033278893.

The spelling of 8187485780 in words is "eight billion, one hundred eighty-seven million, four hundred eighty-five thousand, seven hundred eighty".