507787065649 has 4 divisors (see below), whose sum is σ = 507810130164. Its totient is φ = 507764001136.

The previous prime is 507787065559. The next prime is 507787065679. The reversal of 507787065649 is 946560787705.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45638631424 + 462148434225 = 213632^2 + 679815^2 .

It is a cyclic number.

It is not a de Polignac number, because 507787065649 - 2⁷ = 507787065521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (507787065679) 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 3 ways as a sum of consecutive naturals, for example, 11499202 + ... + 11543275.

It is an arithmetic number, because the mean of its divisors is an integer number (126952532541).

Almost surely, 2^507787065649 is an apocalyptic number.

It is an amenable number.

507787065649 is a deficient number, since it is larger than the sum of its proper divisors (23064515).

507787065649 is a wasteful number, since it uses less digits than its factorization.

507787065649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23064514.

The product of its (nonzero) digits is 88905600, while the sum is 64.

The spelling of 507787065649 in words is "five hundred seven billion, seven hundred eighty-seven million, sixty-five thousand, six hundred forty-nine".