1641145845 has 8 divisors (see below), whose sum is σ = 2625833376. Its totient is φ = 875277776.

The previous prime is 1641145837. The next prime is 1641145889. The reversal of 1641145845 is 5485411461.

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

It is a cyclic number.

It is not a de Polignac number, because 1641145845 - 2³ = 1641145837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54704847 + ... + 54704876.

It is an arithmetic number, because the mean of its divisors is an integer number (328229172).

Almost surely, 2^1641145845 is an apocalyptic number.

1641145845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1641145845 is a deficient number, since it is larger than the sum of its proper divisors (984687531).

1641145845 is a wasteful number, since it uses less digits than its factorization.

1641145845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109409731.

The product of its digits is 76800, while the sum is 39.

The square root of 1641145845 is about 40511.0583051097. The cubic root of 1641145845 is about 1179.5482913885.

The spelling of 1641145845 in words is "one billion, six hundred forty-one million, one hundred forty-five thousand, eight hundred forty-five".