67921922450 has 18 divisors (see below), whose sum is σ = 126338203551. Its totient is φ = 27168031840.

The previous prime is 67921922443. The next prime is 67921922473. The reversal of 67921922450 is 5422912976.

It is a happy number.

67921922450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 31501635169 + 36420287281 = 177487^2 + 190841^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=184285.

It is a super-2 number, since 2×67921922450² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67921922395 and 67921922404.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1824422 + ... + 1861278.

Almost surely, 2^67921922450 is an apocalyptic number.

67921922450 is a deficient number, since it is larger than the sum of its proper divisors (58416281101).

67921922450 is an frugal number, since it uses more digits than its factorization.

67921922450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73726 (or 36864 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 67921922450 in words is "sixty-seven billion, nine hundred twenty-one million, nine hundred twenty-two thousand, four hundred fifty".