1656651149 has 2 divisors, whose sum is σ = 1656651150. Its totient is φ = 1656651148.

The previous prime is 1656651133. The next prime is 1656651151. The reversal of 1656651149 is 9411566561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1511809924 + 144841225 = 38882^2 + 12035^2 .

It is a cyclic number.

It is not a de Polignac number, because 1656651149 - 2⁴ = 1656651133 is a prime.

Together with 1656651151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1656651169) 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 as a sum of consecutive naturals, namely, 828325574 + 828325575.

It is an arithmetic number, because the mean of its divisors is an integer number (828325575).

Almost surely, 2^1656651149 is an apocalyptic number.

It is an amenable number.

1656651149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656651149 is an equidigital number, since it uses as much as digits as its factorization.

1656651149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 44.

The square root of 1656651149 is about 40701.9796692986. The cubic root of 1656651149 is about 1183.2513864476.

The spelling of 1656651149 in words is "one billion, six hundred fifty-six million, six hundred fifty-one thousand, one hundred forty-nine".