9409051665 has 128 divisors (see below), whose sum is σ = 18888629760. Its totient is φ = 4412620800.

The previous prime is 9409051661. The next prime is 9409051679. The reversal of 9409051665 is 5661509049.

It is a happy number.

9409051665 is a `hidden beast` number, since 9 + 40 + 90 + 516 + 6 + 5 = 666.

It is not a de Polignac number, because 9409051665 - 2² = 9409051661 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 9409051665.

It is not an unprimeable number, because it can be changed into a prime (9409051661) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3092545 + ... + 3095585.

It is an arithmetic number, because the mean of its divisors is an integer number (147567420).

Almost surely, 2^9409051665 is an apocalyptic number.

It is an amenable number.

9409051665 is an abundant number, since it is smaller than the sum of its proper divisors (9479578095).

9409051665 is a wasteful number, since it uses less digits than its factorization.

9409051665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3152 (or 3146 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 9409051665 is about 97000.2663140674. The cubic root of 9409051665 is about 2111.1314929586.

The spelling of 9409051665 in words is "nine billion, four hundred nine million, fifty-one thousand, six hundred sixty-five".