6440602264 has 32 divisors (see below), whose sum is σ = 12541446720. Its totient is φ = 3098452896.

The previous prime is 6440602249. The next prime is 6440602283. The reversal of 6440602264 is 4622060446.

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, 116674 + ... + 162769.

It is an arithmetic number, because the mean of its divisors is an integer number (391920210).

Almost surely, 2^6440602264 is an apocalyptic number.

It is an amenable number.

6440602264 is a deficient number, since it is larger than the sum of its proper divisors (6100844456).

6440602264 is a wasteful number, since it uses less digits than its factorization.

6440602264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279559 (or 279555 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 6440602264 is about 80253.3629451128. The cubic root of 6440602264 is about 1860.5534892661.

The spelling of 6440602264 in words is "six billion, four hundred forty million, six hundred two thousand, two hundred sixty-four".