197278401011 has 2 divisors, whose sum is σ = 197278401012. Its totient is φ = 197278401010.

The previous prime is 197278400999. The next prime is 197278401017. The reversal of 197278401011 is 110104872791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197278401011 - 2¹⁰ = 197278399987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197278401011.

It is not a weakly prime, because it can be changed into another prime (197278401017) 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, 98639200505 + 98639200506.

It is an arithmetic number, because the mean of its divisors is an integer number (98639200506).

Almost surely, 2^197278401011 is an apocalyptic number.

197278401011 is a deficient number, since it is larger than the sum of its proper divisors (1).

197278401011 is an equidigital number, since it uses as much as digits as its factorization.

197278401011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 41.

The spelling of 197278401011 in words is "one hundred ninety-seven billion, two hundred seventy-eight million, four hundred one thousand, eleven".