6445782134 has 16 divisors (see below), whose sum is σ = 10549178640. Its totient is φ = 2929474560.

The previous prime is 6445782107. The next prime is 6445782137. The reversal of 6445782134 is 4312875446.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445782137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172382 + ... + 206414.

It is an arithmetic number, because the mean of its divisors is an integer number (659323665).

Almost surely, 2^6445782134 is an apocalyptic number.

6445782134 is a deficient number, since it is larger than the sum of its proper divisors (4103396506).

6445782134 is a wasteful number, since it uses less digits than its factorization.

6445782134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42655.

The product of its digits is 645120, while the sum is 44.

The square root of 6445782134 is about 80285.6284399643. The cubic root of 6445782134 is about 1861.0521404958.

The spelling of 6445782134 in words is "six billion, four hundred forty-five million, seven hundred eighty-two thousand, one hundred thirty-four".