264433135215421 has 8 divisors (see below), whose sum is σ = 268771189540184. Its totient is φ = 260095180403520.

The previous prime is 264433135215383. The next prime is 264433135215427. The reversal of 264433135215421 is 124512531334462.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20806926454521 + 243626208760900 = 4561461^2 + 15608530^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 264433135215421 - 2⁹ = 264433135214909 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 (264433135215427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19510650 + ... + 30158443.

It is an arithmetic number, because the mean of its divisors is an integer number (33596398692523).

Almost surely, 2^{264433135215421} is an apocalyptic number.

It is an amenable number.

264433135215421 is a deficient number, since it is larger than the sum of its proper divisors (4338054324763).

264433135215421 is an equidigital number, since it uses as much as digits as its factorization.

264433135215421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49756431.

The product of its digits is 2073600, while the sum is 46.

Adding to 264433135215421 its reverse (124512531334462), we get a palindrome (388945666549883).

The spelling of 264433135215421 in words is "two hundred sixty-four trillion, four hundred thirty-three billion, one hundred thirty-five million, two hundred fifteen thousand, four hundred twenty-one".