3667618945 has 4 divisors (see below), whose sum is σ = 4401142740. Its totient is φ = 2934095152.

The previous prime is 3667618943. The next prime is 3667618973. The reversal of 3667618945 is 5498167663.

3667618945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5498167663 = 113 ⋅48656351.

It can be written as a sum of positive squares in 2 ways, for example, as 2034731664 + 1632887281 = 45108^2 + 40409^2 .

It is a cyclic number.

It is not a de Polignac number, because 3667618945 - 2¹ = 3667618943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3667618943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366761890 + ... + 366761899.

It is an arithmetic number, because the mean of its divisors is an integer number (1100285685).

Almost surely, 2^3667618945 is an apocalyptic number.

It is an amenable number.

3667618945 is a deficient number, since it is larger than the sum of its proper divisors (733523795).

3667618945 is an equidigital number, since it uses as much as digits as its factorization.

3667618945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733523794.

The product of its digits is 6531840, while the sum is 55.

The square root of 3667618945 is about 60560.8697510199. The cubic root of 3667618945 is about 1542.1551521567.

The spelling of 3667618945 in words is "three billion, six hundred sixty-seven million, six hundred eighteen thousand, nine hundred forty-five".