1653644136 has 32 divisors (see below), whose sum is σ = 4153716000. Its totient is φ = 548600640.

The previous prime is 1653644117. The next prime is 1653644137. The reversal of 1653644136 is 6314463561.

It is a junction number, because it is equal to n+sod(n) for n = 1653644094 and 1653644103.

It is not an unprimeable number, because it can be changed into a prime (1653644137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158211 + ... + 168338.

It is an arithmetic number, because the mean of its divisors is an integer number (129803625).

Almost surely, 2^1653644136 is an apocalyptic number.

It is an amenable number.

1653644136 is an abundant number, since it is smaller than the sum of its proper divisors (2500071864).

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

1653644136 is a wasteful number, since it uses less digits than its factorization.

1653644136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326769 (or 326765 counting only the distinct ones).

The product of its digits is 155520, while the sum is 39.

The square root of 1653644136 is about 40665.0234968578. The cubic root of 1653644136 is about 1182.5350402542.

The spelling of 1653644136 in words is "one billion, six hundred fifty-three million, six hundred forty-four thousand, one hundred thirty-six".