68438222450 has 24 divisors (see below), whose sum is σ = 137087025348. Its totient is φ = 25269497280.

The previous prime is 68438222431. The next prime is 68438222483. The reversal of 68438222450 is 5422283486.

It is a Cunningham number, because it is equal to 261607²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 839782441 + 67598440009 = 28979^2 + 259997^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52644137 + ... + 52645436.

Almost surely, 2^68438222450 is an apocalyptic number.

68438222450 is an abundant number, since it is smaller than the sum of its proper divisors (68648802898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68438222450 is a wasteful number, since it uses less digits than its factorization.

68438222450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105289598 (or 105289593 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 44.

The spelling of 68438222450 in words is "sixty-eight billion, four hundred thirty-eight million, two hundred twenty-two thousand, four hundred fifty".