1916936957477 has 2 divisors, whose sum is σ = 1916936957478. Its totient is φ = 1916936957476.

The previous prime is 1916936957437. The next prime is 1916936957489. The reversal of 1916936957477 is 7747596396191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1697832454081 + 219104503396 = 1303009^2 + 468086^2 .

It is a cyclic number.

It is not a de Polignac number, because 1916936957477 - 2⁶ = 1916936957413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1916936957437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 958468478738 + 958468478739.

It is an arithmetic number, because the mean of its divisors is an integer number (958468478739).

Almost surely, 2^{1916936957477} is an apocalyptic number.

It is an amenable number.

1916936957477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1916936957477 is an equidigital number, since it uses as much as digits as its factorization.

1916936957477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540101520, while the sum is 74.

The spelling of 1916936957477 in words is "one trillion, nine hundred sixteen billion, nine hundred thirty-six million, nine hundred fifty-seven thousand, four hundred seventy-seven".