6443742511 has 8 divisors (see below), whose sum is σ = 6771803984. Its totient is φ = 6123781440.

The previous prime is 6443742497. The next prime is 6443742523. The reversal of 6443742511 is 1152473446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6443742511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6443748511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2023470 + ... + 2026651.

It is an arithmetic number, because the mean of its divisors is an integer number (846475498).

Almost surely, 2^6443742511 is an apocalyptic number.

6443742511 is a deficient number, since it is larger than the sum of its proper divisors (328061473).

6443742511 is a wasteful number, since it uses less digits than its factorization.

6443742511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4050201.

The product of its digits is 80640, while the sum is 37.

The square root of 6443742511 is about 80272.9251429148. The cubic root of 6443742511 is about 1860.8558237359.

The spelling of 6443742511 in words is "six billion, four hundred forty-three million, seven hundred forty-two thousand, five hundred eleven".