649515515507 has 2 divisors, whose sum is σ = 649515515508. Its totient is φ = 649515515506.

The previous prime is 649515515503. The next prime is 649515515513. The reversal of 649515515507 is 705515515946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649515515507 - 2² = 649515515503 is a prime.

It is not a weakly prime, because it can be changed into another prime (649515515503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324757757753 + 324757757754.

It is an arithmetic number, because the mean of its divisors is an integer number (324757757754).

Almost surely, 2^649515515507 is an apocalyptic number.

649515515507 is a deficient number, since it is larger than the sum of its proper divisors (1).

649515515507 is an equidigital number, since it uses as much as digits as its factorization.

649515515507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4725000, while the sum is 53.

The spelling of 649515515507 in words is "six hundred forty-nine billion, five hundred fifteen million, five hundred fifteen thousand, five hundred seven".