4640402644 has 12 divisors (see below), whose sum is σ = 8133956404. Its totient is φ = 2316415104.

The previous prime is 4640402639. The next prime is 4640402653. The reversal of 4640402644 is 4462040464.

It can be written as a sum of positive squares in 2 ways, for example, as 1190250000 + 3450152644 = 34500^2 + 58738^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943797 + ... + 948700.

Almost surely, 2^4640402644 is an apocalyptic number.

It is an amenable number.

4640402644 is a deficient number, since it is larger than the sum of its proper divisors (3493553760).

4640402644 is a wasteful number, since it uses less digits than its factorization.

4640402644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893114 (or 1893112 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

The square root of 4640402644 is about 68120.5009083169. The cubic root of 4640402644 is about 1667.9584269457.

The spelling of 4640402644 in words is "four billion, six hundred forty million, four hundred two thousand, six hundred forty-four".