1649325845 has 16 divisors (see below), whose sum is σ = 2095061760. Its totient is φ = 1244330304.

The previous prime is 1649325841. The next prime is 1649325857. The reversal of 1649325845 is 5485239461.

It is a cyclic number.

It is not a de Polignac number, because 1649325845 - 2² = 1649325841 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1649325845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649325841) 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, 126029 + ... + 138498.

It is an arithmetic number, because the mean of its divisors is an integer number (130941360).

Almost surely, 2^1649325845 is an apocalyptic number.

It is an amenable number.

1649325845 is a deficient number, since it is larger than the sum of its proper divisors (445735915).

1649325845 is a wasteful number, since it uses less digits than its factorization.

1649325845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264604.

The product of its digits is 1036800, while the sum is 47.

The square root of 1649325845 is about 40611.8929009718. The cubic root of 1649325845 is about 1181.5047940244.

The spelling of 1649325845 in words is "one billion, six hundred forty-nine million, three hundred twenty-five thousand, eight hundred forty-five".