1821054648 has 32 divisors (see below), whose sum is σ = 5203013760. Its totient is φ = 520301280.

The previous prime is 1821054643. The next prime is 1821054659. The reversal of 1821054648 is 8464501281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821054643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5419638 + ... + 5419973.

It is an arithmetic number, because the mean of its divisors is an integer number (162594180).

Almost surely, 2^1821054648 is an apocalyptic number.

It is an amenable number.

1821054648 is an abundant number, since it is smaller than the sum of its proper divisors (3381959112).

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

1821054648 is a wasteful number, since it uses less digits than its factorization.

1821054648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10839627 (or 10839623 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 1821054648 is about 42673.8168904540. The cubic root of 1821054648 is about 1221.1649376304.

The spelling of 1821054648 in words is "one billion, eight hundred twenty-one million, fifty-four thousand, six hundred forty-eight".