6433887642 has 96 divisors (see below), whose sum is σ = 16216679808. Its totient is φ = 1657127808.

The previous prime is 6433887619. The next prime is 6433887689. The reversal of 6433887642 is 2467883346.

It is a super-3 number, since 3×6433887642³ (a number of 30 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1006368 + ... + 1012740.

It is an arithmetic number, because the mean of its divisors is an integer number (168923748).

Almost surely, 2^6433887642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6433887642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8108339904).

6433887642 is an abundant number, since it is smaller than the sum of its proper divisors (9782792166).

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

6433887642 is a wasteful number, since it uses less digits than its factorization.

6433887642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6484 (or 6441 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 51.

The square root of 6433887642 is about 80211.5181379832. The cubic root of 6433887642 is about 1859.9066937817.

The spelling of 6433887642 in words is "six billion, four hundred thirty-three million, eight hundred eighty-seven thousand, six hundred forty-two".