5436664121 has 12 divisors (see below), whose sum is σ = 6336736740. Its totient is φ = 4650821280.

The previous prime is 5436664117. The next prime is 5436664139. The reversal of 5436664121 is 1214666345.

It can be written as a sum of positive squares in 2 ways, for example, as 1856317225 + 3580346896 = 43085^2 + 59836^2 .

It is not a de Polignac number, because 5436664121 - 2² = 5436664117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5436664421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84050 + ... + 133931.

It is an arithmetic number, because the mean of its divisors is an integer number (528061395).

Almost surely, 2^5436664121 is an apocalyptic number.

It is an amenable number.

5436664121 is a deficient number, since it is larger than the sum of its proper divisors (900072619).

5436664121 is a wasteful number, since it uses less digits than its factorization.

5436664121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218504 (or 218497 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 5436664121 is about 73733.7380104929. The cubic root of 5436664121 is about 1758.3723029111.

The spelling of 5436664121 in words is "five billion, four hundred thirty-six million, six hundred sixty-four thousand, one hundred twenty-one".