85426417661 has 16 divisors (see below), whose sum is σ = 93986780160. Its totient is φ = 77167883520.

The previous prime is 85426417649. The next prime is 85426417667. The reversal of 85426417661 is 16671462458.

It is not a de Polignac number, because 85426417661 - 2²² = 85422223357 is a prime.

It is a super-2 number, since 2×85426417661² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85426417667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252005 + ... + 484106.

It is an arithmetic number, because the mean of its divisors is an integer number (5874173760).

Almost surely, 2^85426417661 is an apocalyptic number.

It is an amenable number.

85426417661 is a deficient number, since it is larger than the sum of its proper divisors (8560362499).

85426417661 is a wasteful number, since it uses less digits than its factorization.

85426417661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736316.

The product of its digits is 1935360, while the sum is 50.

The spelling of 85426417661 in words is "eighty-five billion, four hundred twenty-six million, four hundred seventeen thousand, six hundred sixty-one".