1649155513 has 2 divisors, whose sum is σ = 1649155514. Its totient is φ = 1649155512.

The previous prime is 1649155489. The next prime is 1649155517. The reversal of 1649155513 is 3155519461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1621833984 + 27321529 = 40272^2 + 5227^2 .

It is an emirp because it is prime and its reverse (3155519461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649155513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1649155517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824577756 + 824577757.

It is an arithmetic number, because the mean of its divisors is an integer number (824577757).

Almost surely, 2^1649155513 is an apocalyptic number.

It is an amenable number.

1649155513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649155513 is an equidigital number, since it uses as much as digits as its factorization.

1649155513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 40.

The square root of 1649155513 is about 40609.7957763887. The cubic root of 1649155513 is about 1181.4641198294.

The spelling of 1649155513 in words is "one billion, six hundred forty-nine million, one hundred fifty-five thousand, five hundred thirteen".