3645686951 has 4 divisors (see below), whose sum is σ = 3645908304. Its totient is φ = 3645465600.

The previous prime is 3645686927. The next prime is 3645686953. The reversal of 3645686951 is 1596865463.

It is a happy number.

3645686951 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: 1596865463 = 433 ⋅3687911.

It is a cyclic number.

It is not a de Polignac number, because 3645686951 - 2⁶ = 3645686887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3645686893 and 3645686902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645686953) 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, 83795 + ... + 119636.

It is an arithmetic number, because the mean of its divisors is an integer number (911477076).

Almost surely, 2^3645686951 is an apocalyptic number.

3645686951 is a deficient number, since it is larger than the sum of its proper divisors (221353).

3645686951 is a wasteful number, since it uses less digits than its factorization.

3645686951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221352.

The product of its digits is 4665600, while the sum is 53.

The square root of 3645686951 is about 60379.5242694078. The cubic root of 3645686951 is about 1539.0750265687.

The spelling of 3645686951 in words is "three billion, six hundred forty-five million, six hundred eighty-six thousand, nine hundred fifty-one".