3645861017 has 4 divisors (see below), whose sum is σ = 3723432576. Its totient is φ = 3568289460.

The previous prime is 3645861007. The next prime is 3645861019. The reversal of 3645861017 is 7101685463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7101685463 = 1901 ⋅3735763.

It is a cyclic number.

It is not a de Polignac number, because 3645861017 - 2²⁰ = 3644812441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3645861019) 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, 38785709 + ... + 38785802.

It is an arithmetic number, because the mean of its divisors is an integer number (930858144).

Almost surely, 2^3645861017 is an apocalyptic number.

It is an amenable number.

3645861017 is a deficient number, since it is larger than the sum of its proper divisors (77571559).

3645861017 is an equidigital number, since it uses as much as digits as its factorization.

3645861017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77571558.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 3645861017 is about 60380.9656845599. The cubic root of 3645861017 is about 1539.0995209346.

The spelling of 3645861017 in words is "three billion, six hundred forty-five million, eight hundred sixty-one thousand, seventeen".