5815606549 has 4 divisors (see below), whose sum is σ = 5819616000. Its totient is φ = 5811597100.

The previous prime is 5815606547. The next prime is 5815606561. The reversal of 5815606549 is 9456065185.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5815606549 - 2¹ = 5815606547 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5815606547) 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, 2002549 + ... + 2005450.

It is an arithmetic number, because the mean of its divisors is an integer number (1454904000).

Almost surely, 2^5815606549 is an apocalyptic number.

It is an amenable number.

5815606549 is a deficient number, since it is larger than the sum of its proper divisors (4009451).

5815606549 is a wasteful number, since it uses less digits than its factorization.

5815606549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4009450.

The product of its (nonzero) digits is 1296000, while the sum is 49.

The square root of 5815606549 is about 76260.1242393428. The cubic root of 5815606549 is about 1798.3118482084.

The spelling of 5815606549 in words is "five billion, eight hundred fifteen million, six hundred six thousand, five hundred forty-nine".