1645855848 has 480 divisors, whose sum is σ = 6058324800. Its totient is φ = 407586816.

The previous prime is 1645855819. The next prime is 1645855859. The reversal of 1645855848 is 8485585461.

1645855848 is a `hidden beast` number, since 1 + 6 + 4 + 58 + 5 + 584 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1645855794 and 1645855803.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 14565040 + ... + 14565152.

It is an arithmetic number, because the mean of its divisors is an integer number (12621510).

Almost surely, 2^1645855848 is an apocalyptic number.

1645855848 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 1645855848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3029162400).

1645855848 is an abundant number, since it is smaller than the sum of its proper divisors (4412468952).

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

1645855848 is a wasteful number, since it uses less digits than its factorization.

1645855848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 157 counting only the distinct ones).

The product of its digits is 6144000, while the sum is 54.

The square root of 1645855848 is about 40569.1489681507. The cubic root of 1645855848 is about 1180.6756276401.

The spelling of 1645855848 in words is "one billion, six hundred forty-five million, eight hundred fifty-five thousand, eight hundred forty-eight".