3972305565 has 24 divisors (see below), whose sum is σ = 6903336960. Its totient is φ = 2113022304.

The previous prime is 3972305531. The next prime is 3972305569. The reversal of 3972305565 is 5655032793.

It is a happy number.

3972305565 is a `hidden beast` number, since 3 + 97 + 2 + 3 + 0 + 556 + 5 = 666.

3972305565 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3972305565 - 2⁷ = 3972305437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 3972305565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3972305569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98005 + ... + 132474.

It is an arithmetic number, because the mean of its divisors is an integer number (287639040).

Almost surely, 2^3972305565 is an apocalyptic number.

It is an amenable number.

3972305565 is a deficient number, since it is larger than the sum of its proper divisors (2931031395).

3972305565 is a wasteful number, since it uses less digits than its factorization.

3972305565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230873 (or 230870 counting only the distinct ones).

The product of its (nonzero) digits is 850500, while the sum is 45.

The square root of 3972305565 is about 63026.2291827775. The cubic root of 3972305565 is about 1583.7290497776.

The spelling of 3972305565 in words is "three billion, nine hundred seventy-two million, three hundred five thousand, five hundred sixty-five".