6335956638 has 192 divisors, whose sum is σ = 16443648000. Its totient is φ = 1756339200.

The previous prime is 6335956631. The next prime is 6335956703. The reversal of 6335956638 is 8366595336.

Its product of digits (10497600) is a multiple of the sum of its prime factors (540).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6335956631) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14111038 + ... + 14111486.

It is an arithmetic number, because the mean of its divisors is an integer number (85644000).

Almost surely, 2^6335956638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6335956638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8221824000).

6335956638 is an abundant number, since it is smaller than the sum of its proper divisors (10107691362).

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

6335956638 is a wasteful number, since it uses less digits than its factorization.

6335956638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 515 counting only the distinct ones).

The product of its digits is 10497600, while the sum is 54.

The square root of 6335956638 is about 79598.7225902527. The cubic root of 6335956638 is about 1850.4217823791.

The spelling of 6335956638 in words is "six billion, three hundred thirty-five million, nine hundred fifty-six thousand, six hundred thirty-eight".