1623555648 has 336 divisors, whose sum is σ = 5711561856. Its totient is φ = 433889280.

The previous prime is 1623555617. The next prime is 1623555667. The reversal of 1623555648 is 8465553261.

1623555648 is a `hidden beast` number, since 1 + 62 + 35 + 556 + 4 + 8 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1894036 + ... + 1894892.

It is an arithmetic number, because the mean of its divisors is an integer number (16998696).

Almost surely, 2^1623555648 is an apocalyptic number.

1623555648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1623555648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2855780928).

1623555648 is an abundant number, since it is smaller than the sum of its proper divisors (4088006208).

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

1623555648 is a wasteful number, since it uses less digits than its factorization.

1623555648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 909 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The square root of 1623555648 is about 40293.3697771730. The cubic root of 1623555648 is about 1175.3189170235.

The spelling of 1623555648 in words is "one billion, six hundred twenty-three million, five hundred fifty-five thousand, six hundred forty-eight".