63727242109 has 2 divisors, whose sum is σ = 63727242110. Its totient is φ = 63727242108.

The previous prime is 63727242101. The next prime is 63727242193. The reversal of 63727242109 is 90124272736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45208114884 + 18519127225 = 212622^2 + 136085^2 .

It is a cyclic number.

It is not a de Polignac number, because 63727242109 - 2³ = 63727242101 is a prime.

It is a super-2 number, since 2×63727242109² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63727242101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31863621054 + 31863621055.

It is an arithmetic number, because the mean of its divisors is an integer number (31863621055).

Almost surely, 2^63727242109 is an apocalyptic number.

It is an amenable number.

63727242109 is a deficient number, since it is larger than the sum of its proper divisors (1).

63727242109 is an equidigital number, since it uses as much as digits as its factorization.

63727242109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 63727242109 in words is "sixty-three billion, seven hundred twenty-seven million, two hundred forty-two thousand, one hundred nine".