1649059845 has 32 divisors (see below), whose sum is σ = 2748038400. Its totient is φ = 843655680.

The previous prime is 1649059843. The next prime is 1649059873. The reversal of 1649059845 is 5489509461.

It is not a de Polignac number, because 1649059845 - 2¹ = 1649059843 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649059843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18481 + ... + 60329.

It is an arithmetic number, because the mean of its divisors is an integer number (85876200).

Almost surely, 2^1649059845 is an apocalyptic number.

1649059845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1649059845 is a deficient number, since it is larger than the sum of its proper divisors (1098978555).

1649059845 is a wasteful number, since it uses less digits than its factorization.

1649059845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41965.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The square root of 1649059845 is about 40608.6178661623. The cubic root of 1649059845 is about 1181.4412736931.

The spelling of 1649059845 in words is "one billion, six hundred forty-nine million, fifty-nine thousand, eight hundred forty-five".