5504123621 has 2 divisors, whose sum is σ = 5504123622. Its totient is φ = 5504123620.

The previous prime is 5504123587. The next prime is 5504123627. The reversal of 5504123621 is 1263214055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2824922500 + 2679201121 = 53150^2 + 51761^2 .

It is a cyclic number.

It is not a de Polignac number, because 5504123621 - 2¹⁸ = 5503861477 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5504123627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2752061810 + 2752061811.

It is an arithmetic number, because the mean of its divisors is an integer number (2752061811).

Almost surely, 2^5504123621 is an apocalyptic number.

It is an amenable number.

5504123621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5504123621 is an equidigital number, since it uses as much as digits as its factorization.

5504123621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 5504123621 is about 74189.7811089910. The cubic root of 5504123621 is about 1765.6152034754.

Adding to 5504123621 its reverse (1263214055), we get a palindrome (6767337676).

The spelling of 5504123621 in words is "five billion, five hundred four million, one hundred twenty-three thousand, six hundred twenty-one".