6450946388 has 6 divisors (see below), whose sum is σ = 11289156186. Its totient is φ = 3225473192.

The previous prime is 6450946351. The next prime is 6450946393. The reversal of 6450946388 is 8836490546.

It can be written as a sum of positive squares in only one way, i.e., 3640674244 + 2810272144 = 60338^2 + 53012^2 .

It is a super-2 number, since 2×6450946388² = 83229418601700493088, which 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, 806368295 + ... + 806368302.

It is an arithmetic number, because the mean of its divisors is an integer number (1881526031).

Almost surely, 2^6450946388 is an apocalyptic number.

It is an amenable number.

6450946388 is a deficient number, since it is larger than the sum of its proper divisors (4838209798).

6450946388 is a wasteful number, since it uses less digits than its factorization.

6450946388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612736601 (or 1612736599 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 53.

The square root of 6450946388 is about 80317.7837592647. The cubic root of 6450946388 is about 1861.5490225494.

The spelling of 6450946388 in words is "six billion, four hundred fifty million, nine hundred forty-six thousand, three hundred eighty-eight".