1949317919953 has 2 divisors, whose sum is σ = 1949317919954. Its totient is φ = 1949317919952.

The previous prime is 1949317919929. The next prime is 1949317920001. The reversal of 1949317919953 is 3599197139491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1853649574144 + 95668345809 = 1361488^2 + 309303^2 .

It is a cyclic number.

It is not a de Polignac number, because 1949317919953 - 2²⁹ = 1948781049041 is a prime.

It is not a weakly prime, because it can be changed into another prime (1949327919953) 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 as a sum of consecutive naturals, namely, 974658959976 + 974658959977.

It is an arithmetic number, because the mean of its divisors is an integer number (974658959977).

Almost surely, 2^{1949317919953} is an apocalyptic number.

It is an amenable number.

1949317919953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1949317919953 is an equidigital number, since it uses as much as digits as its factorization.

1949317919953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74401740, while the sum is 70.

The spelling of 1949317919953 in words is "one trillion, nine hundred forty-nine billion, three hundred seventeen million, nine hundred nineteen thousand, nine hundred fifty-three".