67281257421399 has 48 divisors (see below), whose sum is σ = 104587620519168. Its totient is φ = 38360680259328.

The previous prime is 67281257421383. The next prime is 67281257421401. The reversal of 67281257421399 is 99312475218276.

It is not a de Polignac number, because 67281257421399 - 2⁴ = 67281257421383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67281257421349) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 117978367 + ... + 118547279.

It is an arithmetic number, because the mean of its divisors is an integer number (2178908760816).

Almost surely, 2^{67281257421399} is an apocalyptic number.

67281257421399 is a deficient number, since it is larger than the sum of its proper divisors (37306363097769).

67281257421399 is a wasteful number, since it uses less digits than its factorization.

67281257421399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570724 (or 570717 counting only the distinct ones).

The product of its digits is 91445760, while the sum is 66.

The spelling of 67281257421399 in words is "sixty-seven trillion, two hundred eighty-one billion, two hundred fifty-seven million, four hundred twenty-one thousand, three hundred ninety-nine".