4000219761 has 4 divisors (see below), whose sum is σ = 5333626352. Its totient is φ = 2666813172.

The previous prime is 4000219723. The next prime is 4000219771. The reversal of 4000219761 is 1679120004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4000219761 - 2¹¹ = 4000217713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4000219771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666703291 + ... + 666703296.

It is an arithmetic number, because the mean of its divisors is an integer number (1333406588).

Almost surely, 2^4000219761 is an apocalyptic number.

It is an amenable number.

4000219761 is a deficient number, since it is larger than the sum of its proper divisors (1333406591).

4000219761 is a wasteful number, since it uses less digits than its factorization.

4000219761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333406590.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 4000219761 is about 63247.2905427576. The cubic root of 4000219761 is about 1587.4301221727.

Adding to 4000219761 its reverse (1679120004), we get a palindrome (5679339765).

The spelling of 4000219761 in words is "four billion, two hundred nineteen thousand, seven hundred sixty-one".