120648137749 has 2 divisors, whose sum is σ = 120648137750. Its totient is φ = 120648137748.

The previous prime is 120648137737. The next prime is 120648137773. The reversal of 120648137749 is 947731846021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85727740849 + 34920396900 = 292793^2 + 186870^2 .

It is an emirp because it is prime and its reverse (947731846021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120648137749 - 2⁹ = 120648137237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120648137696 and 120648137705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120648137789) 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, 60324068874 + 60324068875.

It is an arithmetic number, because the mean of its divisors is an integer number (60324068875).

Almost surely, 2^120648137749 is an apocalyptic number.

It is an amenable number.

120648137749 is a deficient number, since it is larger than the sum of its proper divisors (1).

120648137749 is an equidigital number, since it uses as much as digits as its factorization.

120648137749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 120648137749 in words is "one hundred twenty billion, six hundred forty-eight million, one hundred thirty-seven thousand, seven hundred forty-nine".