68351253632 has 16 divisors (see below), whose sum is σ = 136168513350. Its totient is φ = 34175626752.

The previous prime is 68351253629. The next prime is 68351253637. The reversal of 68351253632 is 23635215386.

It can be written as a sum of positive squares in only one way, i.e., 41105129536 + 27246124096 = 202744^2 + 165064^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (68351253637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266996957 + ... + 266997212.

Almost surely, 2^68351253632 is an apocalyptic number.

It is an amenable number.

68351253632 is a deficient number, since it is larger than the sum of its proper divisors (67817259718).

68351253632 is an equidigital number, since it uses as much as digits as its factorization.

68351253632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533994183 (or 533994171 counting only the distinct ones).

The product of its digits is 777600, while the sum is 44.

The spelling of 68351253632 in words is "sixty-eight billion, three hundred fifty-one million, two hundred fifty-three thousand, six hundred thirty-two".