6440242102 has 8 divisors (see below), whose sum is σ = 11040415056. Its totient is φ = 2760103752.

The previous prime is 6440242097. The next prime is 6440242111. The reversal of 6440242102 is 2012420446.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230008633 + ... + 230008660.

It is an arithmetic number, because the mean of its divisors is an integer number (1380051882).

Almost surely, 2^6440242102 is an apocalyptic number.

6440242102 is a deficient number, since it is larger than the sum of its proper divisors (4600172954).

6440242102 is a wasteful number, since it uses less digits than its factorization.

6440242102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460017302.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 6440242102 is about 80251.1190077746. The cubic root of 6440242102 is about 1860.5188075635.

Adding to 6440242102 its reverse (2012420446), we get a palindrome (8452662548).

The spelling of 6440242102 in words is "six billion, four hundred forty million, two hundred forty-two thousand, one hundred two".