67426231406478 has 256 divisors, whose sum is σ = 158210451210240. Its totient is φ = 18761848934400.

The previous prime is 67426231406447. The next prime is 67426231406483. The reversal of 67426231406478 is 87460413262476.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 71653805488 + ... + 71653806428.

It is an arithmetic number, because the mean of its divisors is an integer number (618009575040).

Almost surely, 2^{67426231406478} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67426231406478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79105225605120).

67426231406478 is an abundant number, since it is smaller than the sum of its proper divisors (90784219803762).

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

67426231406478 is a wasteful number, since it uses less digits than its factorization.

67426231406478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983.

The product of its (nonzero) digits is 65028096, while the sum is 60.

The spelling of 67426231406478 in words is "sixty-seven trillion, four hundred twenty-six billion, two hundred thirty-one million, four hundred six thousand, four hundred seventy-eight".