68494268172 has 72 divisors (see below), whose sum is σ = 177481266928. Its totient is φ = 20541818880.

The previous prime is 68494268153. The next prime is 68494268173. The reversal of 68494268172 is 27186249486.

It is not an unprimeable number, because it can be changed into a prime (68494268173) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102313 + ... + 384000.

Almost surely, 2^68494268172 is an apocalyptic number.

It is an amenable number.

68494268172 is an abundant number, since it is smaller than the sum of its proper divisors (108986998756).

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

68494268172 is a wasteful number, since it uses less digits than its factorization.

68494268172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486439 (or 486426 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 57.

The spelling of 68494268172 in words is "sixty-eight billion, four hundred ninety-four million, two hundred sixty-eight thousand, one hundred seventy-two".