5640149461 has 4 divisors (see below), whose sum is σ = 5777714124. Its totient is φ = 5502584800.

The previous prime is 5640149453. The next prime is 5640149479. The reversal of 5640149461 is 1649410465.

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 330112561 + 5310036900 = 18169^2 + 72870^2 .

It is a cyclic number.

It is not a de Polignac number, because 5640149461 - 2³ = 5640149453 is a prime.

It is a super-2 number, since 2×5640149461² = 63622571884837181042, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) 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 (5640149441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68782270 + ... + 68782351.

It is an arithmetic number, because the mean of its divisors is an integer number (1444428531).

Almost surely, 2^5640149461 is an apocalyptic number.

It is an amenable number.

5640149461 is a deficient number, since it is larger than the sum of its proper divisors (137564663).

5640149461 is a wasteful number, since it uses less digits than its factorization.

5640149461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137564662.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 5640149461 is about 75100.9284962576. The cubic root of 5640149461 is about 1780.0418141295.

The spelling of 5640149461 in words is "five billion, six hundred forty million, one hundred forty-nine thousand, four hundred sixty-one".