6423640671 has 8 divisors (see below), whose sum is σ = 9788404864. Its totient is φ = 3670651800.

The previous prime is 6423640667. The next prime is 6423640673. The reversal of 6423640671 is 1760463246.

It is a happy number.

6423640671 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6423640671 - 2² = 6423640667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6423640673) 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, 152943805 + ... + 152943846.

It is an arithmetic number, because the mean of its divisors is an integer number (1223550608).

Almost surely, 2^6423640671 is an apocalyptic number.

6423640671 is a deficient number, since it is larger than the sum of its proper divisors (3364764193).

6423640671 is a wasteful number, since it uses less digits than its factorization.

6423640671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305887661.

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 6423640671 is about 80147.6179995388. The cubic root of 6423640671 is about 1858.9187718176.

The spelling of 6423640671 in words is "six billion, four hundred twenty-three million, six hundred forty thousand, six hundred seventy-one".