1648121144 has 16 divisors (see below), whose sum is σ = 3096996000. Its totient is φ = 822255552.

The previous prime is 1648121113. The next prime is 1648121171. The reversal of 1648121144 is 4411218461.

It is a self number, because there is not a number n which added to its sum of digits gives 1648121144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221744 + ... + 229055.

It is an arithmetic number, because the mean of its divisors is an integer number (193562250).

Almost surely, 2^1648121144 is an apocalyptic number.

It is an amenable number.

1648121144 is a deficient number, since it is larger than the sum of its proper divisors (1448874856).

1648121144 is a wasteful number, since it uses less digits than its factorization.

1648121144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451262 (or 451258 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 1648121144 is about 40597.0583170751. The cubic root of 1648121144 is about 1181.2170589472.

The spelling of 1648121144 in words is "one billion, six hundred forty-eight million, one hundred twenty-one thousand, one hundred forty-four".