5518690388 has 12 divisors (see below), whose sum is σ = 9658684980. Its totient is φ = 2759066112.

The previous prime is 5518690379. The next prime is 5518690393. The reversal of 5518690388 is 8830968155.

It can be written as a sum of positive squares in 2 ways, for example, as 4147617604 + 1371072784 = 64402^2 + 37028^2 .

It is a congruent number.

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, 21581 + ... + 107252.

It is an arithmetic number, because the mean of its divisors is an integer number (804890415).

Almost surely, 2^5518690388 is an apocalyptic number.

It is an amenable number.

5518690388 is a deficient number, since it is larger than the sum of its proper divisors (4139994592).

5518690388 is a wasteful number, since it uses less digits than its factorization.

5518690388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139546 (or 139544 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 53.

The square root of 5518690388 is about 74287.8885687297. Note that the first 3 decimals coincide. The cubic root of 5518690388 is about 1767.1714094206.

The spelling of 5518690388 in words is "five billion, five hundred eighteen million, six hundred ninety thousand, three hundred eighty-eight".