5621887549 has 4 divisors (see below), whose sum is σ = 5624469760. Its totient is φ = 5619305340.

The previous prime is 5621887457. The next prime is 5621887567. The reversal of 5621887549 is 9457881265.

It is a happy number.

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 not a de Polignac number, because 5621887549 - 2⁷ = 5621887421 is a prime.

It is a super-2 number, since 2×5621887549² = 63211239227202454802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5621887549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5621887589) 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, 1287837 + ... + 1292194.

It is an arithmetic number, because the mean of its divisors is an integer number (1406117440).

Almost surely, 2^5621887549 is an apocalyptic number.

It is an amenable number.

5621887549 is a deficient number, since it is larger than the sum of its proper divisors (2582211).

5621887549 is a wasteful number, since it uses less digits than its factorization.

5621887549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582210.

The product of its digits is 4838400, while the sum is 55.

The square root of 5621887549 is about 74979.2474555460. The cubic root of 5621887549 is about 1778.1185722854.

The spelling of 5621887549 in words is "five billion, six hundred twenty-one million, eight hundred eighty-seven thousand, five hundred forty-nine".