5185445815 has 16 divisors (see below), whose sum is σ = 6791454720. Its totient is φ = 3769436320.

The previous prime is 5185445807. The next prime is 5185445827.

It is a happy number.

5185445815 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5185445815 - 2³ = 5185445807 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100026 + ... + 142744.

It is an arithmetic number, because the mean of its divisors is an integer number (424465920).

Almost surely, 2^5185445815 is an apocalyptic number.

5185445815 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

5185445815 is a deficient number, since it is larger than the sum of its proper divisors (1606008905).

5185445815 is a wasteful number, since it uses less digits than its factorization.

5185445815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44942.

The product of its digits is 640000, while the sum is 46.

The square root of 5185445815 is about 72010.0396819777. The cubic root of 5185445815 is about 1730.8603664859.

The spelling of 5185445815 in words is "five billion, one hundred eighty-five million, four hundred forty-five thousand, eight hundred fifteen".