63261392237 has 2 divisors, whose sum is σ = 63261392238. Its totient is φ = 63261392236.

The previous prime is 63261392203. The next prime is 63261392323. The reversal of 63261392237 is 73229316236.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49064908036 + 14196484201 = 221506^2 + 119149^2 .

It is a cyclic number.

It is not a de Polignac number, because 63261392237 - 2⁸ = 63261391981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63261392837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31630696118 + 31630696119.

It is an arithmetic number, because the mean of its divisors is an integer number (31630696119).

Almost surely, 2^63261392237 is an apocalyptic number.

It is an amenable number.

63261392237 is a deficient number, since it is larger than the sum of its proper divisors (1).

63261392237 is an equidigital number, since it uses as much as digits as its factorization.

63261392237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 44.

The spelling of 63261392237 in words is "sixty-three billion, two hundred sixty-one million, three hundred ninety-two thousand, two hundred thirty-seven".