196431240128429 has 2 divisors, whose sum is σ = 196431240128430. Its totient is φ = 196431240128428.

The previous prime is 196431240128401. The next prime is 196431240128531. The reversal of 196431240128429 is 924821042134691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186003281443204 + 10427958685225 = 13638302^2 + 3229235^2 .

It is a cyclic number.

It is not a de Polignac number, because 196431240128429 - 2²⁰ = 196431239079853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196431240188429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98215620064214 + 98215620064215.

It is an arithmetic number, because the mean of its divisors is an integer number (98215620064215).

Almost surely, 2^{196431240128429} is an apocalyptic number.

It is an amenable number.

196431240128429 is a deficient number, since it is larger than the sum of its proper divisors (1).

196431240128429 is an equidigital number, since it uses as much as digits as its factorization.

196431240128429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 196431240128429 in words is "one hundred ninety-six trillion, four hundred thirty-one billion, two hundred forty million, one hundred twenty-eight thousand, four hundred twenty-nine".