3645473816 has 8 divisors (see below), whose sum is σ = 6835263420. Its totient is φ = 1822736904.

The previous prime is 3645473813. The next prime is 3645473827. The reversal of 3645473816 is 6183745463.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645473813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227842106 + ... + 227842121.

Almost surely, 2^3645473816 is an apocalyptic number.

It is an amenable number.

3645473816 is a deficient number, since it is larger than the sum of its proper divisors (3189789604).

3645473816 is a wasteful number, since it uses less digits than its factorization.

3645473816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455684233 (or 455684229 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 47.

The square root of 3645473816 is about 60377.7592827028. The cubic root of 3645473816 is about 1539.0450333966.

The spelling of 3645473816 in words is "three billion, six hundred forty-five million, four hundred seventy-three thousand, eight hundred sixteen".