68426197491 has 8 divisors (see below), whose sum is σ = 91242031824. Its totient is φ = 45613914080.

The previous prime is 68426197471. The next prime is 68426197589. The reversal of 68426197491 is 19479162486.

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 68426197491 - 2¹⁰ = 68426196467 is a prime.

It is a super-3 number, since 3×68426197491³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (68426197451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 842436 + ... + 920081.

It is an arithmetic number, because the mean of its divisors is an integer number (11405253978).

Almost surely, 2^68426197491 is an apocalyptic number.

68426197491 is a deficient number, since it is larger than the sum of its proper divisors (22815834333).

68426197491 is a wasteful number, since it uses less digits than its factorization.

68426197491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775461.

The product of its digits is 5225472, while the sum is 57.

The spelling of 68426197491 in words is "sixty-eight billion, four hundred twenty-six million, one hundred ninety-seven thousand, four hundred ninety-one".