63185135831971 has 2 divisors, whose sum is σ = 63185135831972. Its totient is φ = 63185135831970.

The previous prime is 63185135831959. The next prime is 63185135832011. The reversal of 63185135831971 is 17913853158136.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63185135831971 is a prime.

It is a super-2 number, since 2×63185135831971² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63185135231971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31592567915985 + 31592567915986.

It is an arithmetic number, because the mean of its divisors is an integer number (31592567915986).

Almost surely, 2^{63185135831971} is an apocalyptic number.

63185135831971 is a deficient number, since it is larger than the sum of its proper divisors (1).

63185135831971 is an equidigital number, since it uses as much as digits as its factorization.

63185135831971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16329600, while the sum is 61.

The spelling of 63185135831971 in words is "sixty-three trillion, one hundred eighty-five billion, one hundred thirty-five million, eight hundred thirty-one thousand, nine hundred seventy-one".