1653665532 has 48 divisors (see below), whose sum is σ = 4065196800. Its totient is φ = 521752320.

The previous prime is 1653665467. The next prime is 1653665543. The reversal of 1653665532 is 2355663561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337057 + ... + 341927.

It is an arithmetic number, because the mean of its divisors is an integer number (84691600).

Almost surely, 2^1653665532 is an apocalyptic number.

1653665532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1653665532 is an abundant number, since it is smaller than the sum of its proper divisors (2411531268).

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

1653665532 is a wasteful number, since it uses less digits than its factorization.

1653665532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6386 (or 6384 counting only the distinct ones).

The product of its digits is 486000, while the sum is 42.

The square root of 1653665532 is about 40665.2865722105. The cubic root of 1653665532 is about 1182.5401403863.

The spelling of 1653665532 in words is "one billion, six hundred fifty-three million, six hundred sixty-five thousand, five hundred thirty-two".