6440559334 has 32 divisors (see below), whose sum is σ = 10651709952. Its totient is φ = 2896392000.

The previous prime is 6440559329. The next prime is 6440559341. The reversal of 6440559334 is 4339550446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 933919 + ... + 940789.

It is an arithmetic number, because the mean of its divisors is an integer number (332865936).

Almost surely, 2^6440559334 is an apocalyptic number.

6440559334 is a deficient number, since it is larger than the sum of its proper divisors (4211150618).

6440559334 is a wasteful number, since it uses less digits than its factorization.

6440559334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7332.

The product of its (nonzero) digits is 777600, while the sum is 43.

The square root of 6440559334 is about 80253.0954792399. The cubic root of 6440559334 is about 1860.5493554012.

The spelling of 6440559334 in words is "six billion, four hundred forty million, five hundred fifty-nine thousand, three hundred thirty-four".