6434510644 has 24 divisors (see below), whose sum is σ = 11560412808. Its totient is φ = 3131880960.

The previous prime is 6434510639. The next prime is 6434510653. The reversal of 6434510644 is 4460154346.

It can be written as a sum of positive squares in 4 ways, for example, as 2676820644 + 3757690000 = 51738^2 + 61300^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32022 + ... + 117874.

It is an arithmetic number, because the mean of its divisors is an integer number (481683867).

Almost surely, 2^6434510644 is an apocalyptic number.

It is an amenable number.

6434510644 is a deficient number, since it is larger than the sum of its proper divisors (5125902164).

6434510644 is a wasteful number, since it uses less digits than its factorization.

6434510644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86355 (or 86353 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The square root of 6434510644 is about 80215.4015386073. The cubic root of 6434510644 is about 1859.9667242669.

The spelling of 6434510644 in words is "six billion, four hundred thirty-four million, five hundred ten thousand, six hundred forty-four".