6394455738 has 80 divisors (see below), whose sum is σ = 16453657440. Its totient is φ = 1835719200.

The previous prime is 6394455731. The next prime is 6394455787. The reversal of 6394455738 is 8375544936.

6394455738 is a `hidden beast` number, since 63 + 9 + 4 + 4 + 5 + 573 + 8 = 666.

It is a super-3 number, since 3×6394455738³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (6394455731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 60573 + ... + 128288.

It is an arithmetic number, because the mean of its divisors is an integer number (205670718).

Almost surely, 2^6394455738 is an apocalyptic number.

6394455738 is an abundant number, since it is smaller than the sum of its proper divisors (10059201702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6394455738 is a wasteful number, since it uses less digits than its factorization.

6394455738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188905 (or 188896 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The square root of 6394455738 is about 79965.3408546478. The cubic root of 6394455738 is about 1856.0992497104.

The spelling of 6394455738 in words is "six billion, three hundred ninety-four million, four hundred fifty-five thousand, seven hundred thirty-eight".