649488497949 has 12 divisors (see below), whose sum is σ = 938651493312. Its totient is φ = 432760897800.

The previous prime is 649488497941. The next prime is 649488497953. The reversal of 649488497949 is 949794884946.

649488497949 is a `hidden beast` number, since 6 + 4 + 9 + 4 + 88 + 497 + 9 + 49 = 666.

It is not a de Polignac number, because 649488497949 - 2³ = 649488497941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649488497941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19268407 + ... + 19302084.

It is an arithmetic number, because the mean of its divisors is an integer number (78220957776).

Almost surely, 2^649488497949 is an apocalyptic number.

It is an amenable number.

649488497949 is a deficient number, since it is larger than the sum of its proper divisors (289162995363).

649488497949 is a wasteful number, since it uses less digits than its factorization.

649488497949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38572368 (or 38572365 counting only the distinct ones).

The product of its digits is 4514807808, while the sum is 81.

The spelling of 649488497949 in words is "six hundred forty-nine billion, four hundred eighty-eight million, four hundred ninety-seven thousand, nine hundred forty-nine".