653403612 has 12 divisors (see below), whose sum is σ = 1524608456. Its totient is φ = 217801200.

The previous prime is 653403601. The next prime is 653403613. The reversal of 653403612 is 216304356.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 653403612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653403613) 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, 27225139 + ... + 27225162.

Almost surely, 2^653403612 is an apocalyptic number.

It is an amenable number.

653403612 is an abundant number, since it is smaller than the sum of its proper divisors (871204844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

653403612 is a wasteful number, since it uses less digits than its factorization.

653403612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54450308 (or 54450306 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 653403612 is about 25561.7607374766. The cubic root of 653403612 is about 867.7484440960.

Adding to 653403612 its reverse (216304356), we get a palindrome (869707968).

The spelling of 653403612 in words is "six hundred fifty-three million, four hundred three thousand, six hundred twelve".