4000416605 has 4 divisors (see below), whose sum is σ = 4800499932. Its totient is φ = 3200333280.

The previous prime is 4000416583. The next prime is 4000416619. The reversal of 4000416605 is 5066140004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2288856964 + 1711559641 = 47842^2 + 41371^2 .

It is not a de Polignac number, because 4000416605 - 2⁸ = 4000416349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400041656 + ... + 400041665.

It is an arithmetic number, because the mean of its divisors is an integer number (1200124983).

Almost surely, 2^4000416605 is an apocalyptic number.

It is an amenable number.

4000416605 is a deficient number, since it is larger than the sum of its proper divisors (800083327).

4000416605 is an equidigital number, since it uses as much as digits as its factorization.

4000416605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800083326.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 4000416605 is about 63248.8466693267. The cubic root of 4000416605 is about 1587.4561599897.

Adding to 4000416605 its reverse (5066140004), we get a palindrome (9066556609).

The spelling of 4000416605 in words is "four billion, four hundred sixteen thousand, six hundred five".