6442012099 has 4 divisors (see below), whose sum is σ = 6449565136. Its totient is φ = 6434459064.

The previous prime is 6442012097. The next prime is 6442012117. The reversal of 6442012099 is 9902102446.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6442012099 - 2¹ = 6442012097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6442012091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3775239 + ... + 3776944.

It is an arithmetic number, because the mean of its divisors is an integer number (1612391284).

Almost surely, 2^6442012099 is an apocalyptic number.

6442012099 is a deficient number, since it is larger than the sum of its proper divisors (7553037).

6442012099 is an equidigital number, since it uses as much as digits as its factorization.

6442012099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7553036.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 6442012099 is about 80262.1461150896. The cubic root of 6442012099 is about 1860.6892365120.

The spelling of 6442012099 in words is "six billion, four hundred forty-two million, twelve thousand, ninety-nine".