3405640545 has 20 divisors (see below), whose sum is σ = 6104926740. Its totient is φ = 1816341408.

The previous prime is 3405640531. The next prime is 3405640547. The reversal of 3405640545 is 5450465043.

3405640545 is a `hidden beast` number, since 3 + 4 + 0 + 5 + 640 + 5 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1495600929 + 1910039616 = 38673^2 + 43704^2 .

It is not a de Polignac number, because 3405640545 - 2⁷ = 3405640417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3405640547) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4204090 + ... + 4204899.

It is an arithmetic number, because the mean of its divisors is an integer number (305246337).

Almost surely, 2^3405640545 is an apocalyptic number.

It is an amenable number.

3405640545 is a deficient number, since it is larger than the sum of its proper divisors (2699286195).

3405640545 is an equidigital number, since it uses as much as digits as its factorization.

3405640545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8409006 (or 8408997 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

The square root of 3405640545 is about 58357.8661792907. The cubic root of 3405640545 is about 1504.5256717975.

The spelling of 3405640545 in words is "three billion, four hundred five million, six hundred forty thousand, five hundred forty-five".