63605855197 has 2 divisors, whose sum is σ = 63605855198. Its totient is φ = 63605855196.

The previous prime is 63605855177. The next prime is 63605855221. The reversal of 63605855197 is 79155850636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36318449476 + 27287405721 = 190574^2 + 165189^2 .

It is a cyclic number.

It is not a de Polignac number, because 63605855197 - 2¹⁵ = 63605822429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63605855177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31802927598 + 31802927599.

It is an arithmetic number, because the mean of its divisors is an integer number (31802927599).

Almost surely, 2^63605855197 is an apocalyptic number.

It is an amenable number.

63605855197 is a deficient number, since it is larger than the sum of its proper divisors (1).

63605855197 is an equidigital number, since it uses as much as digits as its factorization.

63605855197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804000, while the sum is 55.

The spelling of 63605855197 in words is "sixty-three billion, six hundred five million, eight hundred fifty-five thousand, one hundred ninety-seven".