763845979649 has 2 divisors, whose sum is σ = 763845979650. Its totient is φ = 763845979648.

The previous prime is 763845979643. The next prime is 763845979691. The reversal of 763845979649 is 946979548367.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 754700500225 + 9145479424 = 868735^2 + 95632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-763845979649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 763845979649.

It is not a weakly prime, because it can be changed into another prime (763845979643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 381922989824 + 381922989825.

It is an arithmetic number, because the mean of its divisors is an integer number (381922989825).

Almost surely, 2^763845979649 is an apocalyptic number.

It is an amenable number.

763845979649 is a deficient number, since it is larger than the sum of its proper divisors (1).

763845979649 is an equidigital number, since it uses as much as digits as its factorization.

763845979649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2469035520, while the sum is 77.

The spelling of 763845979649 in words is "seven hundred sixty-three billion, eight hundred forty-five million, nine hundred seventy-nine thousand, six hundred forty-nine".