1645041456 has 30 divisors (see below), whose sum is σ = 4603831700. Its totient is φ = 548347104.

The previous prime is 1645041449. The next prime is 1645041511. The reversal of 1645041456 is 6541405461.

1645041456 is a `hidden beast` number, since 1 + 6 + 4 + 504 + 145 + 6 = 666.

It is a super-2 number, since 2×1645041456² = 5412322783917199872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1645041456.

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 5 ways as a sum of consecutive naturals, for example, 5711806 + ... + 5712093.

Almost surely, 2^1645041456 is an apocalyptic number.

1645041456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1645041456 is an abundant number, since it is smaller than the sum of its proper divisors (2958790244).

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

1645041456 is a wasteful number, since it uses less digits than its factorization.

1645041456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11423913 (or 11423904 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 1645041456 is about 40559.1106411371. The cubic root of 1645041456 is about 1180.4808573582.

The spelling of 1645041456 in words is "one billion, six hundred forty-five million, forty-one thousand, four hundred fifty-six".