1645032885 has 8 divisors (see below), whose sum is σ = 2632052640. Its totient is φ = 877350864.

The previous prime is 1645032877. The next prime is 1645032889. The reversal of 1645032885 is 5882305461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1645032885 - 2³ = 1645032877 is a prime.

It is a super-2 number, since 2×1645032885² = 5412266385462846450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645032889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54834415 + ... + 54834444.

It is an arithmetic number, because the mean of its divisors is an integer number (329006580).

Almost surely, 2^1645032885 is an apocalyptic number.

1645032885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1645032885 is a deficient number, since it is larger than the sum of its proper divisors (987019755).

1645032885 is a wasteful number, since it uses less digits than its factorization.

1645032885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109668867.

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 1645032885 is about 40559.0049803986. The cubic root of 1645032885 is about 1180.4788071730.

The spelling of 1645032885 in words is "one billion, six hundred forty-five million, thirty-two thousand, eight hundred eighty-five".