6423215761 has 4 divisors (see below), whose sum is σ = 6511205092. Its totient is φ = 6335226432.

The previous prime is 6423215749. The next prime is 6423215783. The reversal of 6423215761 is 1675123246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1675123246 = 2 ⋅837561623.

It can be written as a sum of positive squares in 2 ways, for example, as 3807507025 + 2615708736 = 61705^2 + 51144^2 .

It is a cyclic number.

It is not a de Polignac number, because 6423215761 - 2¹⁵ = 6423182993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6423215761.

It is not an unprimeable number, because it can be changed into a prime (6423215731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43994556 + ... + 43994701.

It is an arithmetic number, because the mean of its divisors is an integer number (1627801273).

Almost surely, 2^6423215761 is an apocalyptic number.

It is an amenable number.

6423215761 is a deficient number, since it is larger than the sum of its proper divisors (87989331).

6423215761 is an equidigital number, since it uses as much as digits as its factorization.

6423215761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87989330.

The product of its digits is 60480, while the sum is 37.

The square root of 6423215761 is about 80144.9671595166. The cubic root of 6423215761 is about 1858.8777830890.

The spelling of 6423215761 in words is "six billion, four hundred twenty-three million, two hundred fifteen thousand, seven hundred sixty-one".