6651642546149 has 2 divisors, whose sum is σ = 6651642546150. Its totient is φ = 6651642546148.

The previous prime is 6651642546013. The next prime is 6651642546161. The reversal of 6651642546149 is 9416452461566.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6651535009249 + 107536900 = 2579057^2 + 10370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6651642546149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6651642576149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325821273074 + 3325821273075.

It is an arithmetic number, because the mean of its divisors is an integer number (3325821273075).

Almost surely, 2^{6651642546149} is an apocalyptic number.

It is an amenable number.

6651642546149 is a deficient number, since it is larger than the sum of its proper divisors (1).

6651642546149 is an equidigital number, since it uses as much as digits as its factorization.

6651642546149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37324800, while the sum is 59.

The spelling of 6651642546149 in words is "six trillion, six hundred fifty-one billion, six hundred forty-two million, five hundred forty-six thousand, one hundred forty-nine".