653816172 has 24 divisors (see below), whose sum is σ = 1535814000. Its totient is φ = 216475456.

The previous prime is 653816171. The next prime is 653816173. The reversal of 653816172 is 271618356.

It is an interprime number because it is at equal distance from previous prime (653816171) and next prime (653816173).

It is a self number, because there is not a number n which added to its sum of digits gives 653816172.

It is not an unprimeable number, because it can be changed into a prime (653816171) 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, 181047 + ... + 184622.

It is an arithmetic number, because the mean of its divisors is an integer number (63992250).

Almost surely, 2^653816172 is an apocalyptic number.

It is an amenable number.

653816172 is an abundant number, since it is smaller than the sum of its proper divisors (881997828).

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

653816172 is a wasteful number, since it uses less digits than its factorization.

653816172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365825 (or 365823 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 653816172 is about 25569.8293306780. The cubic root of 653816172 is about 867.9310382186.

The spelling of 653816172 in words is "six hundred fifty-three million, eight hundred sixteen thousand, one hundred seventy-two".