1645056048 has 80 divisors (see below), whose sum is σ = 4463214336. Its totient is φ = 521114880.

The previous prime is 1645056047. The next prime is 1645056053. The reversal of 1645056048 is 8406505461.

It is a happy number.

It is a super-2 number, since 2×1645056048² = 5412418802122756608, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1645055997 and 1645056015.

It is not an unprimeable number, because it can be changed into a prime (1645056047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168583 + ... + 178073.

Almost surely, 2^1645056048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1645056048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2231607168).

1645056048 is an abundant number, since it is smaller than the sum of its proper divisors (2818158288).

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

1645056048 is a wasteful number, since it uses less digits than its factorization.

1645056048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9682 (or 9676 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 1645056048 is about 40559.2905263393. The cubic root of 1645056048 is about 1180.4843477516.

The spelling of 1645056048 in words is "one billion, six hundred forty-five million, fifty-six thousand, forty-eight".