5387545661 has 4 divisors (see below), whose sum is σ = 5387811072. Its totient is φ = 5387280252.

The previous prime is 5387545609. The next prime is 5387545679. The reversal of 5387545661 is 1665457835.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1665457835 = 5 ⋅333091567.

It is a cyclic number.

It is not a de Polignac number, because 5387545661 - 2²² = 5383351357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5387541661) 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, 99485 + ... + 143778.

It is an arithmetic number, because the mean of its divisors is an integer number (1346952768).

Almost surely, 2^5387545661 is an apocalyptic number.

It is an amenable number.

5387545661 is a deficient number, since it is larger than the sum of its proper divisors (265411).

5387545661 is a wasteful number, since it uses less digits than its factorization.

5387545661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265410.

The product of its digits is 3024000, while the sum is 50.

The square root of 5387545661 is about 73399.9023228233. The cubic root of 5387545661 is about 1753.0608377148.

The spelling of 5387545661 in words is "five billion, three hundred eighty-seven million, five hundred forty-five thousand, six hundred sixty-one".