5655800621 has 4 divisors (see below), whose sum is σ = 5787330912. Its totient is φ = 5524270332.

The previous prime is 5655800609. The next prime is 5655800639. The reversal of 5655800621 is 1260085565.

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-5655800621 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 (5655800321) 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, 65765081 + ... + 65765166.

It is an arithmetic number, because the mean of its divisors is an integer number (1446832728).

Almost surely, 2^5655800621 is an apocalyptic number.

It is an amenable number.

5655800621 is a deficient number, since it is larger than the sum of its proper divisors (131530291).

5655800621 is a wasteful number, since it uses less digits than its factorization.

5655800621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131530290.

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 5655800621 is about 75205.0571504337. The cubic root of 5655800621 is about 1781.6868053521.

The spelling of 5655800621 in words is "five billion, six hundred fifty-five million, eight hundred thousand, six hundred twenty-one".