5621557061 has 4 divisors (see below), whose sum is σ = 5623866252. Its totient is φ = 5619247872.

The previous prime is 5621557057. The next prime is 5621557069. The reversal of 5621557061 is 1607551265.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1607551265 = 5 ⋅321510253.

It can be written as a sum of positive squares in 2 ways, for example, as 3678422500 + 1943134561 = 60650^2 + 44081^2 .

It is a cyclic number.

It is not a de Polignac number, because 5621557061 - 2² = 5621557057 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 (5621557069) 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, 1150940 + ... + 1155813.

It is an arithmetic number, because the mean of its divisors is an integer number (1405966563).

Almost surely, 2^5621557061 is an apocalyptic number.

It is an amenable number.

5621557061 is a deficient number, since it is larger than the sum of its proper divisors (2309191).

5621557061 is a wasteful number, since it uses less digits than its factorization.

5621557061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309190.

The product of its (nonzero) digits is 63000, while the sum is 38.

The square root of 5621557061 is about 74977.0435600124. The cubic root of 5621557061 is about 1778.0837288061.

The spelling of 5621557061 in words is "five billion, six hundred twenty-one million, five hundred fifty-seven thousand, sixty-one".