1245148473649 has 2 divisors, whose sum is σ = 1245148473650. Its totient is φ = 1245148473648.

The previous prime is 1245148473617. The next prime is 1245148473713. The reversal of 1245148473649 is 9463748415421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1007901547249 + 237246926400 = 1003943^2 + 487080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245148473649 - 2⁵ = 1245148473617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1245148473593 and 1245148473602.

It is not a weakly prime, because it can be changed into another prime (1245148479649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622574236824 + 622574236825.

It is an arithmetic number, because the mean of its divisors is an integer number (622574236825).

Almost surely, 2^{1245148473649} is an apocalyptic number.

It is an amenable number.

1245148473649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245148473649 is an equidigital number, since it uses as much as digits as its factorization.

1245148473649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23224320, while the sum is 58.

The spelling of 1245148473649 in words is "one trillion, two hundred forty-five billion, one hundred forty-eight million, four hundred seventy-three thousand, six hundred forty-nine".