67421726455 has 8 divisors (see below), whose sum is σ = 80926593552. Its totient is φ = 53923699968.

The previous prime is 67421726447. The next prime is 67421726459. The reversal of 67421726455 is 55462712476.

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 67421726455 - 2³ = 67421726447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67421726399 and 67421726408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67421726459) 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, 1688442 + ... + 1727911.

It is an arithmetic number, because the mean of its divisors is an integer number (10115824194).

Almost surely, 2^67421726455 is an apocalyptic number.

67421726455 is a deficient number, since it is larger than the sum of its proper divisors (13504867097).

67421726455 is a wasteful number, since it uses less digits than its factorization.

67421726455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420305.

The product of its digits is 2822400, while the sum is 49.

The spelling of 67421726455 in words is "sixty-seven billion, four hundred twenty-one million, seven hundred twenty-six thousand, four hundred fifty-five".