978544675811 has 2 divisors, whose sum is σ = 978544675812. Its totient is φ = 978544675810.

The previous prime is 978544675753. The next prime is 978544675831. The reversal of 978544675811 is 118576445879.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 978544675811 - 2²² = 978540481507 is a prime.

It is a super-3 number, since 3×978544675811³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (978544675831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489272337905 + 489272337906.

It is an arithmetic number, because the mean of its divisors is an integer number (489272337906).

Almost surely, 2^978544675811 is an apocalyptic number.

978544675811 is a deficient number, since it is larger than the sum of its proper divisors (1).

978544675811 is an equidigital number, since it uses as much as digits as its factorization.

978544675811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67737600, while the sum is 65.

The spelling of 978544675811 in words is "nine hundred seventy-eight billion, five hundred forty-four million, six hundred seventy-five thousand, eight hundred eleven".