6442546251 has 8 divisors (see below), whose sum is σ = 8789830720. Its totient is φ = 4195146312.

The previous prime is 6442546249. The next prime is 6442546259. The reversal of 6442546251 is 1526452446.

6442546251 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6442546251 - 2¹ = 6442546249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6442546259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24970981 + ... + 24971238.

It is an arithmetic number, because the mean of its divisors is an integer number (1098728840).

Almost surely, 2^6442546251 is an apocalyptic number.

6442546251 is a deficient number, since it is larger than the sum of its proper divisors (2347284469).

6442546251 is a wasteful number, since it uses less digits than its factorization.

6442546251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49942265.

The product of its digits is 230400, while the sum is 39.

The square root of 6442546251 is about 80265.4735923236. The cubic root of 6442546251 is about 1860.7406626499.

Adding to 6442546251 its reverse (1526452446), we get a palindrome (7968998697).

The spelling of 6442546251 in words is "six billion, four hundred forty-two million, five hundred forty-six thousand, two hundred fifty-one".