6640894495 has 16 divisors (see below), whose sum is σ = 8187939648. Its totient is φ = 5166927360.

The previous prime is 6640894453. The next prime is 6640894511. The reversal of 6640894495 is 5944980466.

It is not a de Polignac number, because 6640894495 - 2¹³ = 6640886303 is a prime.

It is a Duffinian number.

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, 529750 + ... + 542140.

It is an arithmetic number, because the mean of its divisors is an integer number (511746228).

Almost surely, 2^6640894495 is an apocalyptic number.

6640894495 is a deficient number, since it is larger than the sum of its proper divisors (1547045153).

6640894495 is a wasteful number, since it uses less digits than its factorization.

6640894495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15330.

The product of its (nonzero) digits is 7464960, while the sum is 55.

The square root of 6640894495 is about 81491.6835940944. The cubic root of 6640894495 is about 1879.6436716213.

The spelling of 6640894495 in words is "six billion, six hundred forty million, eight hundred ninety-four thousand, four hundred ninety-five".