653198645 has 16 divisors (see below), whose sum is σ = 855627840. Its totient is φ = 474758400.

The previous prime is 653198641. The next prime is 653198683. The reversal of 653198645 is 546891356.

It is a happy number.

It is not a de Polignac number, because 653198645 - 2² = 653198641 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 653198645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653198641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127901 + ... + 132909.

It is an arithmetic number, because the mean of its divisors is an integer number (53476740).

Almost surely, 2^653198645 is an apocalyptic number.

It is an amenable number.

653198645 is a deficient number, since it is larger than the sum of its proper divisors (202429195).

653198645 is a wasteful number, since it uses less digits than its factorization.

653198645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7396.

The product of its digits is 777600, while the sum is 47.

The square root of 653198645 is about 25557.7511725895. The cubic root of 653198645 is about 867.6576995736.

The spelling of 653198645 in words is "six hundred fifty-three million, one hundred ninety-eight thousand, six hundred forty-five".