67280920721281 has 8 divisors (see below), whose sum is σ = 67307300466560. Its totient is φ = 67254541790832.

The previous prime is 67280920721263. The next prime is 67280920721353. The reversal of 67280920721281 is 18212702908276.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67280920721281 - 2¹⁷ = 67280920590209 is a prime.

It is a super-2 number, since 2×67280920721281² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67280920725281) 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, 205278571 + ... + 205606063.

It is an arithmetic number, because the mean of its divisors is an integer number (8413412558320).

Almost surely, 2^{67280920721281} is an apocalyptic number.

It is an amenable number.

67280920721281 is a deficient number, since it is larger than the sum of its proper divisors (26379745279).

67280920721281 is a wasteful number, since it uses less digits than its factorization.

67280920721281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407415.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 67280920721281 in words is "sixty-seven trillion, two hundred eighty billion, nine hundred twenty million, seven hundred twenty-one thousand, two hundred eighty-one".