6639227954240 has 224 divisors, whose sum is σ = 18556387372800. Its totient is φ = 2215565107200.

The previous prime is 6639227954231. The next prime is 6639227954243. The reversal of 6639227954240 is 424597229366.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a self number, because there is not a number n which added to its sum of digits gives 6639227954240.

It is not an unprimeable number, because it can be changed into a prime (6639227954243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13099466 + ... + 13596854.

Almost surely, 2^{6639227954240} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6639227954240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9278193686400).

6639227954240 is an abundant number, since it is smaller than the sum of its proper divisors (11917159418560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6639227954240 is a wasteful number, since it uses less digits than its factorization.

6639227954240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497573 (or 497563 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 59.

The spelling of 6639227954240 in words is "six trillion, six hundred thirty-nine billion, two hundred twenty-seven million, nine hundred fifty-four thousand, two hundred forty".