1649159537 has 2 divisors, whose sum is σ = 1649159538. Its totient is φ = 1649159536.

The previous prime is 1649159527. The next prime is 1649159539. The reversal of 1649159537 is 7359519461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1648684816 + 474721 = 40604^2 + 689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649159537 is a prime.

Together with 1649159539, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1649159539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824579768 + 824579769.

It is an arithmetic number, because the mean of its divisors is an integer number (824579769).

Almost surely, 2^1649159537 is an apocalyptic number.

It is an amenable number.

1649159537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649159537 is an equidigital number, since it uses as much as digits as its factorization.

1649159537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1020600, while the sum is 50.

The square root of 1649159537 is about 40609.8453210548. The cubic root of 1649159537 is about 1181.4650807673.

The spelling of 1649159537 in words is "one billion, six hundred forty-nine million, one hundred fifty-nine thousand, five hundred thirty-seven".