6416642450 has 12 divisors (see below), whose sum is σ = 11934955050. Its totient is φ = 2566656960.

The previous prime is 6416642423. The next prime is 6416642459. The reversal of 6416642450 is 542466146.

It can be written as a sum of positive squares in 3 ways, for example, as 5634153721 + 782488729 = 75061^2 + 27973^2 .

It is a super-2 number, since 2×6416642450² = 82346600662284005000, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6416642459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64166375 + ... + 64166474.

Almost surely, 2^6416642450 is an apocalyptic number.

6416642450 is a deficient number, since it is larger than the sum of its proper divisors (5518312600).

6416642450 is a wasteful number, since it uses less digits than its factorization.

6416642450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128332861 (or 128332856 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 6416642450 is about 80103.9477803685. The cubic root of 6416642450 is about 1858.2434615500.

The spelling of 6416642450 in words is "six billion, four hundred sixteen million, six hundred forty-two thousand, four hundred fifty".