5649977509 has 18 divisors (see below), whose sum is σ = 6417232710. Its totient is φ = 4970552400.

The previous prime is 5649977507. The next prime is 5649977549. The reversal of 5649977509 is 9057799465.

It can be written as a sum of positive squares in only one way, i.e., 5127992100 + 521985409 = 71610^2 + 22847^2 .

It is not a de Polignac number, because 5649977509 - 2¹ = 5649977507 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 (5649977507) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 91987 + ... + 140575.

Almost surely, 2^5649977509 is an apocalyptic number.

It is an amenable number.

5649977509 is a deficient number, since it is larger than the sum of its proper divisors (767255201).

5649977509 is a wasteful number, since it uses less digits than its factorization.

5649977509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48673 (or 48631 counting only the distinct ones).

The product of its (nonzero) digits is 21432600, while the sum is 61.

The square root of 5649977509 is about 75166.3322838091. The cubic root of 5649977509 is about 1781.0751310036.

The spelling of 5649977509 in words is "five billion, six hundred forty-nine million, nine hundred seventy-seven thousand, five hundred nine".