5515578164 has 6 divisors (see below), whose sum is σ = 9652261794. Its totient is φ = 2757789080.

The previous prime is 5515578163. The next prime is 5515578203. The reversal of 5515578164 is 4618755155.

It can be written as a sum of positive squares in only one way, i.e., 3570062500 + 1945515664 = 59750^2 + 44108^2 .

It is a super-2 number, since 2×5515578164² = 60843204966387221792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5515578161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689447267 + ... + 689447274.

It is an arithmetic number, because the mean of its divisors is an integer number (1608710299).

Almost surely, 2^5515578164 is an apocalyptic number.

It is an amenable number.

5515578164 is a deficient number, since it is larger than the sum of its proper divisors (4136683630).

5515578164 is a wasteful number, since it uses less digits than its factorization.

5515578164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378894545 (or 1378894543 counting only the distinct ones).

The product of its digits is 840000, while the sum is 47.

The square root of 5515578164 is about 74266.9385662288. The cubic root of 5515578164 is about 1766.8391526064.

The spelling of 5515578164 in words is "five billion, five hundred fifteen million, five hundred seventy-eight thousand, one hundred sixty-four".