5639295661 has 4 divisors (see below), whose sum is σ = 5643216000. Its totient is φ = 5635375324.

The previous prime is 5639295577. The next prime is 5639295667. The reversal of 5639295661 is 1665929365.

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 a de Polignac number, because none of the positive numbers 2^k-5639295661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5639295599 and 5639295608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5639295667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1958011 + ... + 1960888.

It is an arithmetic number, because the mean of its divisors is an integer number (1410804000).

Almost surely, 2^5639295661 is an apocalyptic number.

It is an amenable number.

5639295661 is a deficient number, since it is larger than the sum of its proper divisors (3920339).

5639295661 is a wasteful number, since it uses less digits than its factorization.

5639295661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3920338.

The product of its digits is 2624400, while the sum is 52.

The square root of 5639295661 is about 75095.2439306245. The cubic root of 5639295661 is about 1779.9519892997.

The spelling of 5639295661 in words is "five billion, six hundred thirty-nine million, two hundred ninety-five thousand, six hundred sixty-one".