5515681349 has 4 divisors (see below), whose sum is σ = 5515999500. Its totient is φ = 5515363200.

The previous prime is 5515681321. The next prime is 5515681403. The reversal of 5515681349 is 9431865155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4029964324 + 1485717025 = 63482^2 + 38545^2 .

It is a cyclic number.

It is not a de Polignac number, because 5515681349 - 2²⁸ = 5247245893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5515681309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131474 + ... + 168275.

It is an arithmetic number, because the mean of its divisors is an integer number (1378999875).

Almost surely, 2^5515681349 is an apocalyptic number.

It is an amenable number.

5515681349 is a deficient number, since it is larger than the sum of its proper divisors (318151).

5515681349 is a wasteful number, since it uses less digits than its factorization.

5515681349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318150.

The product of its digits is 648000, while the sum is 47.

The square root of 5515681349 is about 74267.6332529858. The cubic root of 5515681349 is about 1766.8501705001.

The spelling of 5515681349 in words is "five billion, five hundred fifteen million, six hundred eighty-one thousand, three hundred forty-nine".