5435261621 has 2 divisors, whose sum is σ = 5435261622. Its totient is φ = 5435261620.

The previous prime is 5435261609. The next prime is 5435261669. The reversal of 5435261621 is 1261625345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5326810225 + 108451396 = 72985^2 + 10414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5435261621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5435261681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2717630810 + 2717630811.

It is an arithmetic number, because the mean of its divisors is an integer number (2717630811).

Almost surely, 2^5435261621 is an apocalyptic number.

It is an amenable number.

5435261621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5435261621 is an equidigital number, since it uses as much as digits as its factorization.

5435261621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 35.

The square root of 5435261621 is about 73724.2268253795. The cubic root of 5435261621 is about 1758.2210870679.

Adding to 5435261621 its reverse (1261625345), we get a palindrome (6696886966).

The spelling of 5435261621 in words is "five billion, four hundred thirty-five million, two hundred sixty-one thousand, six hundred twenty-one".