67821079998072 has 32 divisors (see below), whose sum is σ = 175399344824400. Its totient is φ = 21827474022144.

The previous prime is 67821079998041. The next prime is 67821079998079. The reversal of 67821079998072 is 27089997012876.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 67821079997985 and 67821079998003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67821079998079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48722039533 + ... + 48722040924.

Almost surely, 2^{67821079998072} is an apocalyptic number.

It is an amenable number.

67821079998072 is an abundant number, since it is smaller than the sum of its proper divisors (107578264826328).

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

67821079998072 is a wasteful number, since it uses less digits than its factorization.

67821079998072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97444080495 (or 97444080491 counting only the distinct ones).

The product of its (nonzero) digits is 384072192, while the sum is 75.

The spelling of 67821079998072 in words is "sixty-seven trillion, eight hundred twenty-one billion, seventy-nine million, nine hundred ninety-eight thousand, seventy-two".