196491598477 has 2 divisors, whose sum is σ = 196491598478. Its totient is φ = 196491598476.

The previous prime is 196491598409. The next prime is 196491598481. The reversal of 196491598477 is 774895194691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177762581161 + 18729017316 = 421619^2 + 136854^2 .

It is a cyclic number.

It is not a de Polignac number, because 196491598477 - 2¹⁹ = 196491074189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196491598487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98245799238 + 98245799239.

It is an arithmetic number, because the mean of its divisors is an integer number (98245799239).

Almost surely, 2^196491598477 is an apocalyptic number.

It is an amenable number.

196491598477 is a deficient number, since it is larger than the sum of its proper divisors (1).

196491598477 is an equidigital number, since it uses as much as digits as its factorization.

196491598477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 137168640, while the sum is 70.

The spelling of 196491598477 in words is "one hundred ninety-six billion, four hundred ninety-one million, five hundred ninety-eight thousand, four hundred seventy-seven".