1649395511 has 2 divisors, whose sum is σ = 1649395512. Its totient is φ = 1649395510.

The previous prime is 1649395483. The next prime is 1649395513. The reversal of 1649395511 is 1155939461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1649395511 - 2²⁶ = 1582286647 is a prime.

It is a super-2 number, since 2×1649395511² = 5441011103413902242, which contains 22 as substring.

Together with 1649395513, 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 (1649395513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824697755 + 824697756.

It is an arithmetic number, because the mean of its divisors is an integer number (824697756).

Almost surely, 2^1649395511 is an apocalyptic number.

1649395511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649395511 is an equidigital number, since it uses as much as digits as its factorization.

1649395511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145800, while the sum is 44.

The square root of 1649395511 is about 40612.7505963337. The cubic root of 1649395511 is about 1181.5214290138.

The spelling of 1649395511 in words is "one billion, six hundred forty-nine million, three hundred ninety-five thousand, five hundred eleven".