5646265621 has 4 divisors (see below), whose sum is σ = 5650787500. Its totient is φ = 5641743744.

The previous prime is 5646265477. The next prime is 5646265627. The reversal of 5646265621 is 1265626465.

It is a happy number.

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 3839165521 + 1807100100 = 61961^2 + 42510^2 .

It is a cyclic number.

It is not a de Polignac number, because 5646265621 - 2¹⁹ = 5645741333 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 (5646265627) 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, 2259066 + ... + 2261563.

It is an arithmetic number, because the mean of its divisors is an integer number (1412696875).

Almost surely, 2^5646265621 is an apocalyptic number.

It is an amenable number.

5646265621 is a deficient number, since it is larger than the sum of its proper divisors (4521879).

5646265621 is a wasteful number, since it uses less digits than its factorization.

5646265621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4521878.

The product of its digits is 518400, while the sum is 43.

The square root of 5646265621 is about 75141.6370662764. The cubic root of 5646265621 is about 1780.6850055734.

The spelling of 5646265621 in words is "five billion, six hundred forty-six million, two hundred sixty-five thousand, six hundred twenty-one".