85663423738 has 8 divisors (see below), whose sum is σ = 128581436340. Its totient is φ = 42802944960.

The previous prime is 85663423723. The next prime is 85663423763. The reversal of 85663423738 is 83732436658.

It can be written as a sum of positive squares in 2 ways, for example, as 67390602409 + 18272821329 = 259597^2 + 135177^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×85663423738² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14379733 + ... + 14385688.

Almost surely, 2^85663423738 is an apocalyptic number.

85663423738 is a deficient number, since it is larger than the sum of its proper divisors (42918012602).

85663423738 is a wasteful number, since it uses less digits than its factorization.

85663423738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28766912.

The product of its digits is 17418240, while the sum is 55.

The spelling of 85663423738 in words is "eighty-five billion, six hundred sixty-three million, four hundred twenty-three thousand, seven hundred thirty-eight".