40428485165 has 16 divisors (see below), whose sum is σ = 49065839856. Its totient is φ = 31976448000.

The previous prime is 40428485159. The next prime is 40428485177. The reversal of 40428485165 is 56158482404.

It can be written as a sum of positive squares in 8 ways, for example, as 1793437801 + 38635047364 = 42349^2 + 196558^2 .

It is not a de Polignac number, because 40428485165 - 2⁶ = 40428485101 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 137345 + ... + 315785.

It is an arithmetic number, because the mean of its divisors is an integer number (3066614991).

Almost surely, 2^40428485165 is an apocalyptic number.

It is an amenable number.

40428485165 is a deficient number, since it is larger than the sum of its proper divisors (8637354691).

40428485165 is a wasteful number, since it uses less digits than its factorization.

40428485165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178960.

The product of its (nonzero) digits is 1228800, while the sum is 47.

The spelling of 40428485165 in words is "forty billion, four hundred twenty-eight million, four hundred eighty-five thousand, one hundred sixty-five".