85942539405 has 20 divisors (see below), whose sum is σ = 154059960252. Its totient is φ = 45836020800.

The previous prime is 85942539383. The next prime is 85942539439. The reversal of 85942539405 is 50493524958.

85942539405 is a `hidden beast` number, since 8 + 594 + 2 + 5 + 3 + 9 + 40 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 34353139716 + 51589399689 = 185346^2 + 227133^2 .

It is not a de Polignac number, because 85942539405 - 2⁸ = 85942539149 is a prime.

It is a super-2 number, since 2×85942539405² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 106101496 + ... + 106102305.

Almost surely, 2^85942539405 is an apocalyptic number.

It is an amenable number.

85942539405 is a deficient number, since it is larger than the sum of its proper divisors (68117420847).

85942539405 is a wasteful number, since it uses less digits than its factorization.

85942539405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212203818 (or 212203809 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 54.

The spelling of 85942539405 in words is "eighty-five billion, nine hundred forty-two million, five hundred thirty-nine thousand, four hundred five".