653433424621 has 4 divisors (see below), whose sum is σ = 653838530652. Its totient is φ = 653028318592.

The previous prime is 653433424613. The next prime is 653433424661. The reversal of 653433424621 is 126424334356.

653433424621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 207376408996 + 446057015625 = 455386^2 + 667875^2 .

It is a cyclic number.

It is not a de Polignac number, because 653433424621 - 2³ = 653433424613 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 (653433424661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202550596 + ... + 202553821.

It is an arithmetic number, because the mean of its divisors is an integer number (163459632663).

Almost surely, 2^653433424621 is an apocalyptic number.

It is an amenable number.

653433424621 is a deficient number, since it is larger than the sum of its proper divisors (405106031).

653433424621 is a wasteful number, since it uses less digits than its factorization.

653433424621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405106030.

The product of its digits is 1244160, while the sum is 43.

Adding to 653433424621 its reverse (126424334356), we get a palindrome (779857758977).

The spelling of 653433424621 in words is "six hundred fifty-three billion, four hundred thirty-three million, four hundred twenty-four thousand, six hundred twenty-one".