67828663312421 has 16 divisors (see below), whose sum is σ = 74108789637120. Its totient is φ = 61567568677680.

The previous prime is 67828663312409. The next prime is 67828663312477. The reversal of 67828663312421 is 12421336682876.

It is a cyclic number.

It is not a de Polignac number, because 67828663312421 - 2⁶ = 67828663312357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67828663312481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25371260 + ... + 27916986.

It is an arithmetic number, because the mean of its divisors is an integer number (4631799352320).

Almost surely, 2^{67828663312421} is an apocalyptic number.

It is an amenable number.

67828663312421 is a deficient number, since it is larger than the sum of its proper divisors (6280126324699).

67828663312421 is a wasteful number, since it uses less digits than its factorization.

67828663312421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2549464.

The product of its digits is 27869184, while the sum is 59.

The spelling of 67828663312421 in words is "sixty-seven trillion, eight hundred twenty-eight billion, six hundred sixty-three million, three hundred twelve thousand, four hundred twenty-one".