6446372155 has 32 divisors (see below), whose sum is σ = 8566560000. Its totient is φ = 4637130624.

The previous prime is 6446372131. The next prime is 6446372227. The reversal of 6446372155 is 5512736446.

It is a de Polignac number, because none of the positive numbers 2^k-6446372155 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142716 + ... + 182374.

It is an arithmetic number, because the mean of its divisors is an integer number (267705000).

Almost surely, 2^6446372155 is an apocalyptic number.

6446372155 is a deficient number, since it is larger than the sum of its proper divisors (2120187845).

6446372155 is a wasteful number, since it uses less digits than its factorization.

6446372155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39771.

The product of its digits is 604800, while the sum is 43.

The square root of 6446372155 is about 80289.3028678167. The cubic root of 6446372155 is about 1861.1089231752.

The spelling of 6446372155 in words is "six billion, four hundred forty-six million, three hundred seventy-two thousand, one hundred fifty-five".