3545640409 has 2 divisors, whose sum is σ = 3545640410. Its totient is φ = 3545640408.

The previous prime is 3545640391. The next prime is 3545640443. The reversal of 3545640409 is 9040465453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1855197184 + 1690443225 = 43072^2 + 41115^2 .

It is a cyclic number.

It is not a de Polignac number, because 3545640409 - 2⁷ = 3545640281 is a prime.

It is not a weakly prime, because it can be changed into another prime (3545646409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1772820204 + 1772820205.

It is an arithmetic number, because the mean of its divisors is an integer number (1772820205).

Almost surely, 2^3545640409 is an apocalyptic number.

It is an amenable number.

3545640409 is a deficient number, since it is larger than the sum of its proper divisors (1).

3545640409 is an equidigital number, since it uses as much as digits as its factorization.

3545640409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 40.

The square root of 3545640409 is about 59545.2803251442. The cubic root of 3545640409 is about 1524.8655847129.

The spelling of 3545640409 in words is "three billion, five hundred forty-five million, six hundred forty thousand, four hundred nine".