1945805841 has 16 divisors (see below), whose sum is σ = 3294486400. Its totient is φ = 1111888944.

The previous prime is 1945805831. The next prime is 1945805863. The reversal of 1945805841 is 1485085491.

It is a happy number.

1945805841 is a `hidden beast` number, since 19 + 4 + 58 + 0 + 584 + 1 = 666.

1945805841 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1945805841 - 2¹³ = 1945797649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1945805821) 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, 5147446 + ... + 5147823.

It is an arithmetic number, because the mean of its divisors is an integer number (205905400).

Almost surely, 2^1945805841 is an apocalyptic number.

It is an amenable number.

1945805841 is a deficient number, since it is larger than the sum of its proper divisors (1348680559).

1945805841 is a wasteful number, since it uses less digits than its factorization.

1945805841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10295285 (or 10295279 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The square root of 1945805841 is about 44111.2892693016. The cubic root of 1945805841 is about 1248.4366249152.

The spelling of 1945805841 in words is "one billion, nine hundred forty-five million, eight hundred five thousand, eight hundred forty-one".