1645386048 has 168 divisors, whose sum is σ = 4922357440. Its totient is φ = 544942080.

The previous prime is 1645385993. The next prime is 1645386053. The reversal of 1645386048 is 8406835461.

1645386048 is a `hidden beast` number, since 1 + 6 + 4 + 5 + 38 + 604 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1645385994 and 1645386012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3747813 + ... + 3748251.

Almost surely, 2^1645386048 is an apocalyptic number.

1645386048 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 1645386048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2461178720).

1645386048 is an abundant number, since it is smaller than the sum of its proper divisors (3276971392).

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

1645386048 is an equidigital number, since it uses as much as digits as its factorization.

1645386048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 1645386048 is about 40563.3584408392. The cubic root of 1645386048 is about 1180.5632779476.

The spelling of 1645386048 in words is "one billion, six hundred forty-five million, three hundred eighty-six thousand, forty-eight".