1653121110 has 48 divisors (see below), whose sum is σ = 4005748656. Its totient is φ = 436621632.

The previous prime is 1653121109. The next prime is 1653121121. The reversal of 1653121110 is 111213561.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 341064 + ... + 345876.

It is an arithmetic number, because the mean of its divisors is an integer number (83453097).

Almost surely, 2^1653121110 is an apocalyptic number.

1653121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1653121110 is an abundant number, since it is smaller than the sum of its proper divisors (2352627546).

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

1653121110 is a wasteful number, since it uses less digits than its factorization.

1653121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5037 (or 4930 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 1653121110 is about 40658.5920808874. The cubic root of 1653121110 is about 1182.4103536550.

Adding to 1653121110 its reverse (111213561), we get a palindrome (1764334671).

The spelling of 1653121110 in words is "one billion, six hundred fifty-three million, one hundred twenty-one thousand, one hundred ten".