6644154506 has 32 divisors (see below), whose sum is σ = 11551818240. Its totient is φ = 2842372800.

The previous prime is 6644154449. The next prime is 6644154529. The reversal of 6644154506 is 6054514466.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 77351 + ... + 138821.

It is an arithmetic number, because the mean of its divisors is an integer number (360994320).

Almost surely, 2^6644154506 is an apocalyptic number.

6644154506 is a deficient number, since it is larger than the sum of its proper divisors (4907663734).

6644154506 is a wasteful number, since it uses less digits than its factorization.

6644154506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61535 (or 61501 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

The square root of 6644154506 is about 81511.6832484767. The cubic root of 6644154506 is about 1879.9511932780.

The spelling of 6644154506 in words is "six billion, six hundred forty-four million, one hundred fifty-four thousand, five hundred six".