5477761621 has 2 divisors, whose sum is σ = 5477761622. Its totient is φ = 5477761620.

The previous prime is 5477761567. The next prime is 5477761711. The reversal of 5477761621 is 1261677745.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3756341521 + 1721420100 = 61289^2 + 41490^2 .

It is a cyclic number.

It is not a de Polignac number, because 5477761621 - 2¹⁵ = 5477728853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5477761321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2738880810 + 2738880811.

It is an arithmetic number, because the mean of its divisors is an integer number (2738880811).

Almost surely, 2^5477761621 is an apocalyptic number.

It is an amenable number.

5477761621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5477761621 is an equidigital number, since it uses as much as digits as its factorization.

5477761621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 493920, while the sum is 46.

The square root of 5477761621 is about 74011.9018874667. The cubic root of 5477761621 is about 1762.7918865776.

The spelling of 5477761621 in words is "five billion, four hundred seventy-seven million, seven hundred sixty-one thousand, six hundred twenty-one".