5645607949 has 4 divisors (see below), whose sum is σ = 5653662300. Its totient is φ = 5637553600.

The previous prime is 5645607943. The next prime is 5645607953. The reversal of 5645607949 is 9497065465.

It is a happy number.

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 3397141225 + 2248466724 = 58285^2 + 47418^2 .

It is a cyclic number.

It is not a de Polignac number, because 5645607949 - 2²⁷ = 5511390221 is a prime.

It is a super-2 number, since 2×5645607949² = 63745778227623973202, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5645607949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5645607943) 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, 4026124 + ... + 4027525.

It is an arithmetic number, because the mean of its divisors is an integer number (1413415575).

Almost surely, 2^5645607949 is an apocalyptic number.

It is an amenable number.

5645607949 is a deficient number, since it is larger than the sum of its proper divisors (8054351).

5645607949 is an equidigital number, since it uses as much as digits as its factorization.

5645607949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8054350.

The product of its (nonzero) digits is 8164800, while the sum is 55.

The square root of 5645607949 is about 75137.2607232923. The cubic root of 5645607949 is about 1780.6158653534.

The spelling of 5645607949 in words is "five billion, six hundred forty-five million, six hundred seven thousand, nine hundred forty-nine".