840550845 has 16 divisors (see below), whose sum is σ = 1364955840. Its totient is φ = 441602304.

The previous prime is 840550831. The next prime is 840550849. The reversal of 840550845 is 548055048.

It is not a de Polignac number, because 840550845 - 2⁴ = 840550829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840550849) 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, 417180 + ... + 419189.

It is an arithmetic number, because the mean of its divisors is an integer number (85309740).

Almost surely, 2^840550845 is an apocalyptic number.

It is an amenable number.

840550845 is a deficient number, since it is larger than the sum of its proper divisors (524404995).

840550845 is a wasteful number, since it uses less digits than its factorization.

840550845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836444.

The product of its (nonzero) digits is 128000, while the sum is 39.

The square root of 840550845 is about 28992.2549140283. The cubic root of 840550845 is about 943.7449984677.

The spelling of 840550845 in words is "eight hundred forty million, five hundred fifty thousand, eight hundred forty-five".