6450863601844 has 6 divisors (see below), whose sum is σ = 11289011303234. Its totient is φ = 3225431800920.

The previous prime is 6450863601823. The next prime is 6450863601907. The reversal of 6450863601844 is 4481063680546.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6412999112100 + 37864489744 = 2532390^2 + 194588^2 .

It is a super-2 number, since 2×6450863601844² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806357950227 + ... + 806357950234.

Almost surely, 2^{6450863601844} is an apocalyptic number.

It is an amenable number.

6450863601844 is a deficient number, since it is larger than the sum of its proper divisors (4838147701390).

6450863601844 is a wasteful number, since it uses less digits than its factorization.

6450863601844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612715900465 (or 1612715900463 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 55.

The spelling of 6450863601844 in words is "six trillion, four hundred fifty billion, eight hundred sixty-three million, six hundred one thousand, eight hundred forty-four".