13887762649 has 2 divisors, whose sum is σ = 13887762650. Its totient is φ = 13887762648.

The previous prime is 13887762619. The next prime is 13887762671. The reversal of 13887762649 is 94626778831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13440228624 + 447534025 = 115932^2 + 21155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13887762649 is a prime.

It is not a weakly prime, because it can be changed into another prime (13887762619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6943881324 + 6943881325.

It is an arithmetic number, because the mean of its divisors is an integer number (6943881325).

Almost surely, 2^13887762649 is an apocalyptic number.

It is an amenable number.

13887762649 is a deficient number, since it is larger than the sum of its proper divisors (1).

13887762649 is an equidigital number, since it uses as much as digits as its factorization.

13887762649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24385536, while the sum is 61.

The spelling of 13887762649 in words is "thirteen billion, eight hundred eighty-seven million, seven hundred sixty-two thousand, six hundred forty-nine".