3609949745 has 32 divisors (see below), whose sum is σ = 4872700800. Its totient is φ = 2551274496.

The previous prime is 3609949741. The next prime is 3609949771. The reversal of 3609949745 is 5479499063.

It is a cyclic number.

It is not a de Polignac number, because 3609949745 - 2² = 3609949741 is a prime.

It is a super-2 number, since 2×3609949745² = 26063474322851130050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3609949741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165782 + ... + 186288.

It is an arithmetic number, because the mean of its divisors is an integer number (152271900).

Almost surely, 2^3609949745 is an apocalyptic number.

It is an amenable number.

3609949745 is a deficient number, since it is larger than the sum of its proper divisors (1262751055).

3609949745 is a wasteful number, since it uses less digits than its factorization.

3609949745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20657.

The product of its (nonzero) digits is 7348320, while the sum is 56.

The square root of 3609949745 is about 60082.8573305232. The cubic root of 3609949745 is about 1534.0295258776.

The spelling of 3609949745 in words is "three billion, six hundred nine million, nine hundred forty-nine thousand, seven hundred forty-five".