1653423544 has 32 divisors (see below), whose sum is σ = 3154530240. Its totient is φ = 812246400.

The previous prime is 1653423509. The next prime is 1653423557. The reversal of 1653423544 is 4453243561.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 693234 + ... + 695614.

It is an arithmetic number, because the mean of its divisors is an integer number (98579070).

Almost surely, 2^1653423544 is an apocalyptic number.

It is an amenable number.

1653423544 is a deficient number, since it is larger than the sum of its proper divisors (1501106696).

1653423544 is a wasteful number, since it uses less digits than its factorization.

1653423544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3871 (or 3867 counting only the distinct ones).

The product of its digits is 172800, while the sum is 37.

The square root of 1653423544 is about 40662.3111000838. The cubic root of 1653423544 is about 1182.4824555084.

The spelling of 1653423544 in words is "one billion, six hundred fifty-three million, four hundred twenty-three thousand, five hundred forty-four".