6451750666049 has 24 divisors (see below), whose sum is σ = 7100019411240. Its totient is φ = 5827925666304.

The previous prime is 6451750666033. The next prime is 6451750666073. The reversal of 6451750666049 is 9406660571546.

It can be written as a sum of positive squares in 4 ways, for example, as 3837708426049 + 2614042240000 = 1959007^2 + 1616800^2 .

It is not a de Polignac number, because 6451750666049 - 2⁴ = 6451750666033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6451750066049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304762937 + ... + 304784105.

It is an arithmetic number, because the mean of its divisors is an integer number (295834142135).

Almost surely, 2^{6451750666049} is an apocalyptic number.

It is an amenable number.

6451750666049 is a deficient number, since it is larger than the sum of its proper divisors (648268745191).

6451750666049 is a wasteful number, since it uses less digits than its factorization.

6451750666049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31889 (or 31842 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 59.

The spelling of 6451750666049 in words is "six trillion, four hundred fifty-one billion, seven hundred fifty million, six hundred sixty-six thousand, forty-nine".