3540431665 has 4 divisors (see below), whose sum is σ = 4248518004. Its totient is φ = 2832345328.

The previous prime is 3540431647. The next prime is 3540431683. The reversal of 3540431665 is 5661340453.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (3540431647) and next prime (3540431683).

It can be written as a sum of positive squares in 2 ways, for example, as 2031575329 + 1508856336 = 45073^2 + 38844^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3540431665 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354043162 + ... + 354043171.

It is an arithmetic number, because the mean of its divisors is an integer number (1062129501).

Almost surely, 2^3540431665 is an apocalyptic number.

It is an amenable number.

3540431665 is a deficient number, since it is larger than the sum of its proper divisors (708086339).

3540431665 is an equidigital number, since it uses as much as digits as its factorization.

3540431665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708086338.

The product of its (nonzero) digits is 129600, while the sum is 37.

The square root of 3540431665 is about 59501.5265770551. The cubic root of 3540431665 is about 1524.1185144973.

The spelling of 3540431665 in words is "three billion, five hundred forty million, four hundred thirty-one thousand, six hundred sixty-five".