63812849897 has 2 divisors, whose sum is σ = 63812849898. Its totient is φ = 63812849896.

The previous prime is 63812849887. The next prime is 63812849927. The reversal of 63812849897 is 79894821836.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32393160361 + 31419689536 = 179981^2 + 177256^2 .

It is a cyclic number.

It is not a de Polignac number, because 63812849897 - 2¹² = 63812845801 is a prime.

It is not a weakly prime, because it can be changed into another prime (63812849887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31906424948 + 31906424949.

It is an arithmetic number, because the mean of its divisors is an integer number (31906424949).

Almost surely, 2^63812849897 is an apocalyptic number.

It is an amenable number.

63812849897 is a deficient number, since it is larger than the sum of its proper divisors (1).

63812849897 is an equidigital number, since it uses as much as digits as its factorization.

63812849897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41803776, while the sum is 65.

The spelling of 63812849897 in words is "sixty-three billion, eight hundred twelve million, eight hundred forty-nine thousand, eight hundred ninety-seven".