85823940137 has 4 divisors (see below), whose sum is σ = 92425781700. Its totient is φ = 79222098576.

The previous prime is 85823940121. The next prime is 85823940161. The reversal of 85823940137 is 73104932858.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73104932858 = 2 ⋅36552466429.

It can be written as a sum of positive squares in 2 ways, for example, as 26133632281 + 59690307856 = 161659^2 + 244316^2 .

It is a cyclic number.

It is not a de Polignac number, because 85823940137 - 2⁴ = 85823940121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85823960137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3300920762 + ... + 3300920787.

It is an arithmetic number, because the mean of its divisors is an integer number (23106445425).

Almost surely, 2^85823940137 is an apocalyptic number.

It is an amenable number.

85823940137 is a deficient number, since it is larger than the sum of its proper divisors (6601841563).

85823940137 is a wasteful number, since it uses less digits than its factorization.

85823940137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6601841562.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 85823940137 in words is "eighty-five billion, eight hundred twenty-three million, nine hundred forty thousand, one hundred thirty-seven".