919311211220057 has 2 divisors, whose sum is σ = 919311211220058. Its totient is φ = 919311211220056.

The previous prime is 919311211220011. The next prime is 919311211220069. The reversal of 919311211220057 is 750022112113919.

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., 889715609266201 + 29595601953856 = 29828101^2 + 5440184^2 .

It is a cyclic number.

It is not a de Polignac number, because 919311211220057 - 2¹⁰ = 919311211219033 is a prime.

It is not a weakly prime, because it can be changed into another prime (919311211228057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459655605610028 + 459655605610029.

It is an arithmetic number, because the mean of its divisors is an integer number (459655605610029).

Almost surely, 2^{919311211220057} is an apocalyptic number.

It is an amenable number.

919311211220057 is a deficient number, since it is larger than the sum of its proper divisors (1).

919311211220057 is an equidigital number, since it uses as much as digits as its factorization.

919311211220057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 44.

The spelling of 919311211220057 in words is "nine hundred nineteen trillion, three hundred eleven billion, two hundred eleven million, two hundred twenty thousand, fifty-seven".