6637494649389 has 32 divisors (see below), whose sum is σ = 9163047715200. Its totient is φ = 4268733423360.

The previous prime is 6637494649363. The next prime is 6637494649391. The reversal of 6637494649389 is 9839464947366.

It is not a de Polignac number, because 6637494649389 - 2²³ = 6637486260781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6637494649339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 966293647 + ... + 966300515.

It is an arithmetic number, because the mean of its divisors is an integer number (286345241100).

Almost surely, 2^{6637494649389} is an apocalyptic number.

It is an amenable number.

6637494649389 is a deficient number, since it is larger than the sum of its proper divisors (2525553065811).

6637494649389 is a wasteful number, since it uses less digits than its factorization.

6637494649389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14845.

The product of its digits is 5079158784, while the sum is 78.

The spelling of 6637494649389 in words is "six trillion, six hundred thirty-seven billion, four hundred ninety-four million, six hundred forty-nine thousand, three hundred eighty-nine".