63951615901 has 2 divisors, whose sum is σ = 63951615902. Its totient is φ = 63951615900.

The previous prime is 63951615877. The next prime is 63951615941. The reversal of 63951615901 is 10951615936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42210113401 + 21741502500 = 205451^2 + 147450^2 .

It is a cyclic number.

It is not a de Polignac number, because 63951615901 - 2⁷ = 63951615773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63951615941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31975807950 + 31975807951.

It is an arithmetic number, because the mean of its divisors is an integer number (31975807951).

Almost surely, 2^63951615901 is an apocalyptic number.

It is an amenable number.

63951615901 is a deficient number, since it is larger than the sum of its proper divisors (1).

63951615901 is an equidigital number, since it uses as much as digits as its factorization.

63951615901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 218700, while the sum is 46.

The spelling of 63951615901 in words is "sixty-three billion, nine hundred fifty-one million, six hundred fifteen thousand, nine hundred one".