5615481818 has 8 divisors (see below), whose sum is σ = 8423815860. Its totient is φ = 2807543200.

The previous prime is 5615481791. The next prime is 5615481821. The reversal of 5615481818 is 8181845165.

It can be written as a sum of positive squares in 2 ways, for example, as 3865481929 + 1749999889 = 62173^2 + 41833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60353 + ... + 121956.

Almost surely, 2^5615481818 is an apocalyptic number.

5615481818 is a deficient number, since it is larger than the sum of its proper divisors (2808334042).

5615481818 is a wasteful number, since it uses less digits than its factorization.

5615481818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197712.

The product of its digits is 307200, while the sum is 47.

The square root of 5615481818 is about 74936.5185874017. The cubic root of 5615481818 is about 1777.4429701272.

The spelling of 5615481818 in words is "five billion, six hundred fifteen million, four hundred eighty-one thousand, eight hundred eighteen".