612178142197 has 2 divisors, whose sum is σ = 612178142198. Its totient is φ = 612178142196.

The previous prime is 612178142143. The next prime is 612178142239. The reversal of 612178142197 is 791241871216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 533427190321 + 78750951876 = 730361^2 + 280626^2 .

It is a cyclic number.

It is not a de Polignac number, because 612178142197 - 2¹⁵ = 612178109429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 612178142197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612178142117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306089071098 + 306089071099.

It is an arithmetic number, because the mean of its divisors is an integer number (306089071099).

Almost surely, 2^612178142197 is an apocalyptic number.

It is an amenable number.

612178142197 is a deficient number, since it is larger than the sum of its proper divisors (1).

612178142197 is an equidigital number, since it uses as much as digits as its factorization.

612178142197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 49.

The spelling of 612178142197 in words is "six hundred twelve billion, one hundred seventy-eight million, one hundred forty-two thousand, one hundred ninety-seven".