3533720645 has 16 divisors (see below), whose sum is σ = 5219034240. Its totient is φ = 2236728384.

The previous prime is 3533720627. The next prime is 3533720711. The reversal of 3533720645 is 5460273353.

It is a cyclic number.

It is not a de Polignac number, because 3533720645 - 2⁸ = 3533720389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3533720599 and 3533720608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3882755 + ... + 3883664.

It is an arithmetic number, because the mean of its divisors is an integer number (326189640).

Almost surely, 2^3533720645 is an apocalyptic number.

3533720645 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3533720645 is a deficient number, since it is larger than the sum of its proper divisors (1685313595).

3533720645 is a wasteful number, since it uses less digits than its factorization.

3533720645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7766444.

The product of its (nonzero) digits is 226800, while the sum is 38.

The square root of 3533720645 is about 59445.1061484459. The cubic root of 3533720645 is about 1523.1548975921.

Adding to 3533720645 its reverse (5460273353), we get a palindrome (8993993998).

The spelling of 3533720645 in words is "three billion, five hundred thirty-three million, seven hundred twenty thousand, six hundred forty-five".